diff --git a/analysis_options.yaml b/analysis_options.yaml
index 78997bce..c8a428c4 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,7 +1,7 @@
 include: package:flutter_lints/flutter.yaml
 
 analyzer:
-  exclude: [build/**, lib/swagger_generated_code/**]
+  exclude: [build/**, lib/swagger_generated_code/**, lib/objectbox_generated_code/*.g.dart]
   errors:
     always_use_package_imports: error
     directives_ordering: error
diff --git a/build.yaml b/build.yaml
index 16cafd91..d4d52949 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2,6 +2,10 @@ targets:
   $default:
     sources:
       - swaggers/**
+      - lib/$lib$
+      # - $package$
+      - lib/**
+      - pubspec.yaml
     builders:
       chopper_generator:
         options:
diff --git a/lib/app/services/converters.dart b/lib/app/services/converters.dart
index d346dc6a..5ca7d563 100644
--- a/lib/app/services/converters.dart
+++ b/lib/app/services/converters.dart
@@ -1,11 +1,16 @@
+import 'dart:convert';
+
 import 'package:gruene_app/app/services/enums.dart';
 import 'package:gruene_app/app/services/nominatim_service.dart';
+import 'package:gruene_app/features/campaigns/helper/campaign_action.dart';
 import 'package:gruene_app/features/campaigns/models/doors/door_detail_model.dart';
 import 'package:gruene_app/features/campaigns/models/flyer/flyer_detail_model.dart';
 import 'package:gruene_app/features/campaigns/models/map_layer_model.dart';
 import 'package:gruene_app/features/campaigns/models/marker_item_model.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_create_model.dart';
 import 'package:gruene_app/features/campaigns/models/posters/poster_detail_model.dart';
 import 'package:gruene_app/features/campaigns/models/posters/poster_list_item_model.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_update_model.dart';
 import 'package:gruene_app/features/campaigns/widgets/enhanced_wheel_slider.dart';
 import 'package:gruene_app/features/campaigns/widgets/text_input_field.dart';
 import 'package:gruene_app/i18n/translations.g.dart';
@@ -25,3 +30,7 @@ part 'converters/poi_address_parsing.dart';
 part 'converters/focus_area_parsing.dart';
 part 'converters/poi_parsing.dart';
 part 'converters/slider_range_parsing.dart';
+part 'converters/date_time_parsing.dart';
+part 'converters/poster_create_model_parsing.dart';
+part 'converters/poster_update_model_parsing.dart';
+part 'converters/campaign_action_parsing.dart';
diff --git a/lib/app/services/converters/campaign_action_parsing.dart b/lib/app/services/converters/campaign_action_parsing.dart
new file mode 100644
index 00000000..b064f57e
--- /dev/null
+++ b/lib/app/services/converters/campaign_action_parsing.dart
@@ -0,0 +1,25 @@
+part of '../converters.dart';
+
+extension CampaignActionParsing on CampaignAction {
+  PosterCreateModel getSerializedAsPosterCreate() {
+    var data = jsonDecode(serialized!) as Map<String, dynamic>;
+    if (data['photo'] != null) {
+      data['photo'] = (data['photo'] as List<dynamic>).cast<int>();
+    }
+    data['location'] = (data['location'] as List<dynamic>).cast<double>();
+
+    var model = PosterCreateModel.fromJson(data);
+    return model;
+  }
+
+  PosterUpdateModel getSerializedAsPosterUpdate() {
+    var data = jsonDecode(serialized!) as Map<String, dynamic>;
+    if (data['photo'] != null) {
+      data['photo'] = (data['photo'] as List<dynamic>).cast<int>();
+    }
+    data['location'] = (data['location'] as List<dynamic>).cast<double>();
+
+    var model = PosterUpdateModel.fromJson(data);
+    return model;
+  }
+}
diff --git a/lib/app/services/converters/date_time_parsing.dart b/lib/app/services/converters/date_time_parsing.dart
new file mode 100644
index 00000000..5128f34d
--- /dev/null
+++ b/lib/app/services/converters/date_time_parsing.dart
@@ -0,0 +1,12 @@
+part of '../converters.dart';
+
+extension DateTimeParsing on DateTime {
+  String getDateTimeAsString() {
+    DateTime datetime = this;
+    final dateString = DateFormat(t.campaigns.poster.date_format).format(datetime);
+    final timeString = DateFormat(t.campaigns.poster.time_format).format(datetime);
+    return t.campaigns.poster.datetime_display_template
+        .replaceAll('{date}', dateString)
+        .replaceAll('{time}', timeString);
+  }
+}
diff --git a/lib/app/services/converters/poi_parsing.dart b/lib/app/services/converters/poi_parsing.dart
index ed0045b9..877a537a 100644
--- a/lib/app/services/converters/poi_parsing.dart
+++ b/lib/app/services/converters/poi_parsing.dart
@@ -22,7 +22,7 @@ extension PoiParsing on Poi {
       address: poi.address.transformToAddressModel(),
       openedDoors: poi.house!.countOpenedDoors.toInt(),
       closedDoors: poi.house!.countClosedDoors.toInt(),
-      createdAt: _getDateTimeAsString(poi.createdAt),
+      createdAt: poi.createdAt.getDateTimeAsString(),
     );
   }
 
@@ -37,8 +37,9 @@ extension PoiParsing on Poi {
       imageUrl: _getImageUrl(poi),
       address: poi.address.transformToAddressModel(),
       status: poi.poster!.status.transformToModelPosterStatus(),
+      location: coords.transformToLatLng(),
       comment: poi.poster!.comment ?? '',
-      createdAt: _getDateTimeAsString(poi.createdAt),
+      createdAt: poi.createdAt.getDateTimeAsString(),
     );
   }
 
@@ -51,7 +52,7 @@ extension PoiParsing on Poi {
       id: poi.id,
       address: poi.address.transformToAddressModel(),
       flyerCount: poi.flyerSpot!.flyerCount.toInt(),
-      createdAt: _getDateTimeAsString(poi.createdAt),
+      createdAt: poi.createdAt.getDateTimeAsString(),
     );
   }
 
@@ -74,15 +75,7 @@ extension PoiParsing on Poi {
 
   String _getLastChangeDateTimeInfo() {
     final lastChange = updatedAt.toLocal();
-    return _getDateTimeAsString(lastChange);
-  }
-
-  String _getDateTimeAsString(DateTime lastChange) {
-    final lastChangeDate = DateFormat(t.campaigns.poster.date_format).format(lastChange);
-    final lastChangeTime = DateFormat(t.campaigns.poster.time_format).format(lastChange);
-    return t.campaigns.poster.datetime_display_template
-        .replaceAll('{date}', lastChangeDate)
-        .replaceAll('{time}', lastChangeTime);
+    return lastChange.getDateTimeAsString();
   }
 
   String _getLastChangeStatus() {
diff --git a/lib/app/services/converters/poi_service_type_parsing.dart b/lib/app/services/converters/poi_service_type_parsing.dart
index ca6bbe2c..1fcc0cdb 100644
--- a/lib/app/services/converters/poi_service_type_parsing.dart
+++ b/lib/app/services/converters/poi_service_type_parsing.dart
@@ -33,4 +33,17 @@ extension PoiServiceTypeParsing on PoiServiceType {
         return CreatePoiType.flyerSpot;
     }
   }
+
+  String getAsMarkerItemStatus(PosterStatus? posterStatus) {
+    var typeName = name;
+    switch (this) {
+      case PoiServiceType.poster:
+        String statusSuffix = '';
+        if (posterStatus != null) statusSuffix = '_${posterStatus.name}';
+        return '$typeName$statusSuffix';
+      case PoiServiceType.door:
+      case PoiServiceType.flyer:
+        return typeName;
+    }
+  }
 }
diff --git a/lib/app/services/converters/poster_create_model_parsing.dart b/lib/app/services/converters/poster_create_model_parsing.dart
new file mode 100644
index 00000000..6ff162e9
--- /dev/null
+++ b/lib/app/services/converters/poster_create_model_parsing.dart
@@ -0,0 +1,25 @@
+part of '../converters.dart';
+
+extension PosterCreateModelParsing on PosterCreateModel {
+  MarkerItemModel transformToVirtualMarkerItem(int temporaryId) {
+    return MarkerItemModel.virtual(
+      id: temporaryId,
+      status: PoiServiceType.poster.getAsMarkerItemStatus(PosterStatus.ok),
+      location: location,
+    );
+  }
+
+  PosterDetailModel transformToPosterDetailModel(int temporaryId) {
+    return PosterDetailModel(
+      id: temporaryId.toString(),
+      status: PosterStatus.ok,
+      address: address,
+      thumbnailUrl: null,
+      imageUrl: null,
+      location: location,
+      comment: '',
+      createdAt: '${DateTime.now().getDateTimeAsString()}*', // should mark this as preliminary
+      isCached: true,
+    );
+  }
+}
diff --git a/lib/app/services/converters/poster_update_model_parsing.dart b/lib/app/services/converters/poster_update_model_parsing.dart
new file mode 100644
index 00000000..0538ca27
--- /dev/null
+++ b/lib/app/services/converters/poster_update_model_parsing.dart
@@ -0,0 +1,33 @@
+part of '../converters.dart';
+
+extension PosterUpdateModelParsing on PosterUpdateModel {
+  MarkerItemModel transformToVirtualMarkerItem() {
+    return MarkerItemModel.virtual(
+      id: int.parse(id),
+      status: PoiServiceType.poster.getAsMarkerItemStatus(status),
+      location: location,
+    );
+  }
+
+  PosterDetailModel transformToPosterDetailModel(int temporaryId) {
+    return PosterDetailModel(
+      id: temporaryId.toString(),
+      status: status,
+      address: address,
+      thumbnailUrl: null,
+      imageUrl: null,
+      location: location,
+      comment: comment,
+      createdAt: '${DateTime.now().getDateTimeAsString()}*', // should mark this as preliminary
+      isCached: true,
+    );
+  }
+
+  PosterUpdateModel mergeWith(PosterUpdateModel newPosterUpdate) {
+    var oldPosterUdpate = this;
+
+    return newPosterUpdate.copyWith(
+      removePreviousPhotos: newPosterUpdate.removePreviousPhotos || oldPosterUdpate.removePreviousPhotos,
+    );
+  }
+}
diff --git a/lib/app/services/nominatim_service.dart b/lib/app/services/nominatim_service.dart
index 5c02b020..c76666cf 100644
--- a/lib/app/services/nominatim_service.dart
+++ b/lib/app/services/nominatim_service.dart
@@ -1,7 +1,10 @@
 import 'package:gruene_app/app/geocode/nominatim.dart';
+import 'package:json_annotation/json_annotation.dart';
 import 'package:logger/logger.dart';
 import 'package:maplibre_gl/maplibre_gl.dart';
 
+part 'nominatim_service.g.dart';
+
 class NominatimService {
   final Logger _logger = Logger();
 
@@ -22,13 +25,14 @@ class NominatimService {
   }
 }
 
+@JsonSerializable()
 class AddressModel {
   final String street;
   final String city;
   final String zipCode;
   final String houseNumber;
 
-  const AddressModel({this.street = '', this.houseNumber = '', this.zipCode = '', this.city = ''});
+  AddressModel({this.street = '', this.houseNumber = '', this.zipCode = '', this.city = ''});
 
   /*
   * More details on how to find and categorize "places" can be found in the OSM Wiki:
@@ -48,4 +52,11 @@ class AddressModel {
             place.address?['town']?.toString() ??
             place.address?['village']?.toString() ??
             '';
+
+  /// Connect the generated [_$AddressModelFromJson] function to the `fromJson`
+  /// factory.
+  factory AddressModel.fromJson(Map<String, dynamic> json) => _$AddressModelFromJson(json);
+
+  /// Connect the generated [_$AddressModelToJson] function to the `toJson` method.
+  Map<String, dynamic> toJson() => _$AddressModelToJson(this);
 }
diff --git a/lib/app/services/object_box.dart b/lib/app/services/object_box.dart
new file mode 100644
index 00000000..60457158
--- /dev/null
+++ b/lib/app/services/object_box.dart
@@ -0,0 +1,27 @@
+import 'dart:async';
+
+import 'package:gruene_app/objectbox_generated_code/objectbox.g.dart';
+import 'package:path/path.dart' as p;
+import 'package:path_provider/path_provider.dart';
+
+class ObjectBox {
+  static ObjectBox? _instance;
+
+  // ObjectBox._();
+
+  factory ObjectBox() => _instance!;
+
+  /// The Store of this app.
+  late final Store store;
+
+  ObjectBox._create(this.store) {
+    // Add any additional setup code, e.g. build queries.
+  }
+
+  /// Create an instance of ObjectBox to use throughout the app.
+  static Future<void> init() async {
+    final docsDir = await getApplicationDocumentsDirectory();
+    final store = await openStore(directory: p.join(docsDir.path, 'wk-cache'));
+    _instance = ObjectBox._create(store);
+  }
+}
diff --git a/lib/app/widgets/app_bar.dart b/lib/app/widgets/app_bar.dart
index fd83698f..53de44fd 100644
--- a/lib/app/widgets/app_bar.dart
+++ b/lib/app/widgets/app_bar.dart
@@ -5,6 +5,7 @@ import 'package:gruene_app/app/auth/bloc/auth_bloc.dart';
 import 'package:gruene_app/app/constants/routes.dart';
 import 'package:gruene_app/app/theme/theme.dart';
 import 'package:gruene_app/app/widgets/icon.dart';
+import 'package:gruene_app/features/campaigns/helper/campaign_action_cache.dart';
 
 class MainAppBar extends StatelessWidget implements PreferredSizeWidget {
   const MainAppBar({super.key});
@@ -24,14 +25,7 @@ class MainAppBar extends StatelessWidget implements PreferredSizeWidget {
       backgroundColor: theme.primaryColor,
       centerTitle: true,
       actions: [
-        if (currentRoute.path == Routes.campaigns.path)
-          IconButton(
-            icon: CustomIcon(
-              path: 'assets/icons/refresh.svg',
-              color: ThemeColors.background,
-            ),
-            onPressed: null,
-          ),
+        if (currentRoute.path == Routes.campaigns.path) RefreshButton(),
         if (currentRoute.path != Routes.settings.path && isLoggedIn)
           IconButton(
             icon: CustomIcon(
@@ -47,3 +41,51 @@ class MainAppBar extends StatelessWidget implements PreferredSizeWidget {
   @override
   Size get preferredSize => const Size.fromHeight(kToolbarHeight);
 }
+
+class RefreshButton extends StatefulWidget {
+  const RefreshButton({
+    super.key,
+  });
+
+  @override
+  State<RefreshButton> createState() => _RefreshButtonState();
+}
+
+class _RefreshButtonState extends State<RefreshButton> {
+  int _currentCount = 0;
+
+  @override
+  void initState() {
+    var campaignActionCache = CampaignActionCache();
+    _currentCount = campaignActionCache.getCachedActionCount();
+
+    campaignActionCache.addListener(_setCurrentCounter);
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    const maxLabelCount = 99;
+    var labelText = _currentCount > maxLabelCount ? '$maxLabelCount+' : _currentCount.toString();
+    return IconButton(
+      icon: Badge(
+        label: Text(labelText),
+        isLabelVisible: _currentCount != 0,
+        child: CustomIcon(
+          path: 'assets/icons/refresh.svg',
+          color: ThemeColors.background,
+        ),
+      ),
+      onPressed: null,
+    );
+  }
+
+  void _setCurrentCounter() {
+    var campaignActionCache = CampaignActionCache();
+    final newCount = campaignActionCache.getCachedActionCount();
+    if (!mounted) return;
+    setState(() {
+      _currentCount = newCount;
+    });
+  }
+}
diff --git a/lib/features/campaigns/helper/campaign_action.dart b/lib/features/campaigns/helper/campaign_action.dart
new file mode 100644
index 00000000..75992766
--- /dev/null
+++ b/lib/features/campaigns/helper/campaign_action.dart
@@ -0,0 +1,65 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
+// import 'package:objectbox/objectbox.dart';
+
+import 'package:objectbox/objectbox.dart';
+
+@Entity()
+class CampaignAction {
+  int id;
+  int? poiId;
+  late int poiTempId;
+  @Transient()
+  CampaignActionType? actionType;
+  String? serialized;
+
+  CampaignAction({
+    this.id = 0,
+    this.poiId,
+    this.actionType,
+    this.serialized,
+  }) {
+    poiTempId = DateTime.now().millisecondsSinceEpoch;
+  }
+
+  int? get actionTypeValue {
+    _ensureStableEnumValues();
+    return actionType?.index;
+  }
+
+  set actionTypeValue(int? value) {
+    _ensureStableEnumValues();
+    if (value == null) {
+      actionType = null;
+    } else {
+      actionType = value >= 0 && value < CampaignActionType.values.length
+          ? CampaignActionType.values[value]
+          : CampaignActionType.unknown;
+    }
+  }
+
+  void _ensureStableEnumValues() {
+    assert(CampaignActionType.unknown.index == 0);
+    assert(CampaignActionType.addPoster.index == 1);
+    assert(CampaignActionType.editPoster.index == 2);
+    assert(CampaignActionType.deletePoster.index == 3);
+    assert(CampaignActionType.addDoor.index == 4);
+    assert(CampaignActionType.editDoor.index == 5);
+    assert(CampaignActionType.deleteDoor.index == 6);
+    assert(CampaignActionType.addFlyer.index == 7);
+    assert(CampaignActionType.editFlyer.index == 8);
+    assert(CampaignActionType.deleteFlyer.index == 9);
+  }
+}
+
+enum CampaignActionType {
+  unknown,
+  addPoster,
+  editPoster,
+  deletePoster,
+  addDoor,
+  editDoor,
+  deleteDoor,
+  addFlyer,
+  editFlyer,
+  deleteFlyer,
+}
diff --git a/lib/features/campaigns/helper/campaign_action_cache.dart b/lib/features/campaigns/helper/campaign_action_cache.dart
new file mode 100644
index 00000000..0776f756
--- /dev/null
+++ b/lib/features/campaigns/helper/campaign_action_cache.dart
@@ -0,0 +1,144 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:gruene_app/app/services/converters.dart';
+import 'package:gruene_app/app/services/object_box.dart';
+import 'package:gruene_app/features/campaigns/helper/campaign_action.dart';
+import 'package:gruene_app/features/campaigns/models/marker_item_model.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_create_model.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_detail_model.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_update_model.dart';
+import 'package:gruene_app/objectbox_generated_code/objectbox.g.dart';
+import 'package:maplibre_gl/maplibre_gl.dart';
+
+class CampaignActionCache extends ChangeNotifier {
+  static CampaignActionCache? _instance;
+
+  CampaignActionCache._();
+
+  factory CampaignActionCache() => _instance ??= CampaignActionCache._();
+
+  Future<void> _addAction(CampaignAction action) async {
+    var box = ObjectBox().store.box<CampaignAction>();
+    await box.putAsync(action);
+    notifyListeners();
+  }
+
+  int getCachedActionCount() {
+    var box = ObjectBox().store.box<CampaignAction>();
+    return box.count();
+  }
+
+  Future<MarkerItemModel> addPosterCreate(PosterCreateModel posterCreate) async {
+    final action = CampaignAction(
+      actionType: CampaignActionType.addPoster,
+      serialized: jsonEncode(posterCreate.toJson()),
+    );
+    await _addAction(action);
+    return posterCreate.transformToVirtualMarkerItem(action.poiTempId);
+  }
+
+  Future<MarkerItemModel> addPosterDelete(String posterId) async {
+    final action = CampaignAction(
+      poiId: int.parse(posterId),
+      actionType: CampaignActionType.deletePoster,
+    );
+    await _addAction(action);
+    return _getDeletePosterMarkerModel(action.poiId!);
+  }
+
+  Future<MarkerItemModel> addPosterUpdate(PosterUpdateModel posterUpdate) async {
+    var actions =
+        (await _findActionsByPoiId(posterUpdate.id)).where((x) => x.actionType == CampaignActionType.editPoster);
+    var action = actions.singleOrNull;
+    if (action == null) {
+      action = CampaignAction(
+        poiId: int.parse(posterUpdate.id),
+        actionType: CampaignActionType.editPoster,
+        serialized: jsonEncode(posterUpdate.toJson()),
+      );
+    } else {
+      // update previous edit action
+      var oldUpdate = action.getSerializedAsPosterUpdate();
+      var newPosterUpdate = oldUpdate.mergeWith(posterUpdate);
+      action.serialized = jsonEncode(newPosterUpdate.toJson());
+    }
+
+    await _addAction(action);
+
+    return posterUpdate.transformToVirtualMarkerItem();
+  }
+
+  MarkerItemModel _getDeletePosterMarkerModel(int id) {
+    return MarkerItemModel.virtual(
+      id: id,
+      status: 'poster_deleted',
+      location: LatLng(0, 0),
+    );
+  }
+
+  List<MarkerItemModel> getPosterMarkerItems() {
+    List<MarkerItemModel> markerItems = [];
+    var box = ObjectBox().store.box<CampaignAction>();
+    var posterActions = [
+      CampaignActionType.addPoster.index,
+      CampaignActionType.editPoster.index,
+      CampaignActionType.deletePoster.index,
+    ];
+    var condition = CampaignAction_.actionTypeValue.oneOf(posterActions);
+
+    var q = box.query(condition).order(CampaignAction_.poiTempId, flags: Order.descending);
+    final posterCacheList = q.build().find();
+    for (var action in posterCacheList) {
+      if (markerItems.any((m) => m.id! == action.id)) continue;
+      switch (action.actionType) {
+        case CampaignActionType.addPoster:
+          var model = action.getSerializedAsPosterCreate();
+          markerItems.add(model.transformToVirtualMarkerItem(action.poiTempId));
+        case CampaignActionType.editPoster:
+          var model = action.getSerializedAsPosterUpdate();
+          markerItems.add(model.transformToVirtualMarkerItem());
+        case CampaignActionType.deletePoster:
+          var model = _getDeletePosterMarkerModel(action.poiId!);
+          markerItems.add(model);
+        case CampaignActionType.unknown:
+        case CampaignActionType.addDoor:
+        case CampaignActionType.editDoor:
+        case CampaignActionType.deleteDoor:
+        case CampaignActionType.addFlyer:
+        case CampaignActionType.editFlyer:
+        case CampaignActionType.deleteFlyer:
+        case null:
+          throw UnimplementedError();
+      }
+      if (action.actionType == CampaignActionType.addPoster) {}
+    }
+    return markerItems;
+  }
+
+  Future<PosterDetailModel> getPoiAsPosterDetail(String poiId) async {
+    var posterCacheList = await _findActionsByPoiId(poiId);
+    var addPosterActions = posterCacheList.where((p) => p.actionType == CampaignActionType.addPoster).toList();
+    var editPosterActions = posterCacheList.where((p) => p.actionType == CampaignActionType.editPoster).toList();
+    if (editPosterActions.isNotEmpty) {
+      var editPosterAction = editPosterActions.single;
+      var model = editPosterAction.getSerializedAsPosterUpdate();
+      return model.transformToPosterDetailModel(int.parse(poiId));
+    } else {
+      var addPosterAction = addPosterActions.single;
+
+      var model = addPosterAction.getSerializedAsPosterCreate();
+      return model.transformToPosterDetailModel(int.parse(poiId));
+    }
+  }
+
+  Future<List<CampaignAction>> _findActionsByPoiId(String poiId) async {
+    var box = ObjectBox().store.box<CampaignAction>();
+    var condition =
+        CampaignAction_.poiId.equals(int.parse(poiId)).or(CampaignAction_.poiTempId.equals(int.parse(poiId)));
+
+    var q = box.query(condition).order(CampaignAction_.poiTempId);
+    var posterCacheList = await q.build().findAsync();
+    return posterCacheList;
+  }
+}
diff --git a/lib/features/campaigns/helper/map_helper.dart b/lib/features/campaigns/helper/map_helper.dart
index 4e386f8e..6a7c36b5 100644
--- a/lib/features/campaigns/helper/map_helper.dart
+++ b/lib/features/campaigns/helper/map_helper.dart
@@ -42,4 +42,11 @@ class MapHelper {
     final id = feature['id'].toString();
     return id;
   }
+
+  static bool extractIsCachedFromFeature(Map<String, dynamic> feature) {
+    if (feature['properties'] == null) return false;
+    final properties = feature['properties'] as Map<String, dynamic>;
+    if (properties['is_virtual'] == null) return false;
+    return bool.parse(properties['is_virtual'].toString());
+  }
 }
diff --git a/lib/features/campaigns/helper/marker_item_helper.dart b/lib/features/campaigns/helper/marker_item_helper.dart
index 2fdd4c23..fcb1e821 100644
--- a/lib/features/campaigns/helper/marker_item_helper.dart
+++ b/lib/features/campaigns/helper/marker_item_helper.dart
@@ -15,6 +15,7 @@ class MarkerItemHelper {
       id: markerItem.id,
       properties: <String, dynamic>{
         'status_type': markerItem.status,
+        'is_virtual': markerItem.isVirtual,
       },
       geometry: Point(coordinates: Position(markerItem.location.longitude, markerItem.location.latitude)),
     );
diff --git a/lib/features/campaigns/helper/marker_item_manager.dart b/lib/features/campaigns/helper/marker_item_manager.dart
index e68507f9..094dc4f7 100644
--- a/lib/features/campaigns/helper/marker_item_manager.dart
+++ b/lib/features/campaigns/helper/marker_item_manager.dart
@@ -1,15 +1,32 @@
 import 'package:gruene_app/features/campaigns/models/marker_item_model.dart';
 
 class MarkerItemManager {
-  final List<MarkerItemModel> loadedMarkers = [];
+  List<MarkerItemModel> loadedMarkers = [];
+  final List<MarkerItemModel> virtualMarkers = [];
 
   void addMarkers(List<MarkerItemModel> poiList) {
-    loadedMarkers.retainWhere((oldMarker) => poiList.any((newMarker) => newMarker.id != oldMarker.id));
-    loadedMarkers.addAll(poiList);
+    // get virtual marker items and add them to cache list
+    var newVirtualMarkers = poiList.where((p) => p.isVirtual).toList();
+    virtualMarkers.retainWhere((oldMarker) => !newVirtualMarkers.any((newMarker) => newMarker.id == oldMarker.id));
+    virtualMarkers.addAll(newVirtualMarkers);
+
+    // get marker items which are not in cache
+    var newStoredMarkers = poiList
+        .where((p) => !p.isVirtual)
+        .where((p) => !virtualMarkers.any((virtualMarker) => virtualMarker.id == p.id))
+        .toList();
+
+    // remove previously loaded markers to update them
+    loadedMarkers.retainWhere((oldMarker) => !newStoredMarkers.any((newMarker) => newMarker.id == oldMarker.id));
+
+    // remove loaded markers which are also in cache
+    loadedMarkers.removeWhere((oldMarker) => virtualMarkers.any((cachedMarker) => cachedMarker.id == oldMarker.id));
+
+    loadedMarkers.addAll(newStoredMarkers);
   }
 
   List<MarkerItemModel> getMarkers() {
-    return loadedMarkers;
+    return loadedMarkers + virtualMarkers;
   }
 
   void removeMarker(int markerItemId) {
diff --git a/lib/features/campaigns/location/location_ffi.dart b/lib/features/campaigns/location/location_ffi.dart
index ecedf511..a2c00864 100644
--- a/lib/features/campaigns/location/location_ffi.dart
+++ b/lib/features/campaigns/location/location_ffi.dart
@@ -3,8 +3,8 @@ import 'package:gruene_app/app/constants/config.dart';
 
 final platform = MethodChannel('${Config.appId}/location');
 
-/// Checks whether location services are enabled
-/// without using Google Play Services
+// Checks whether location services are enabled
+// without using Google Play Services
 Future<bool> isNonGoogleLocationServiceEnabled() async {
   try {
     final bool result = await platform.invokeMethod('isLocationServiceEnabled') as bool;
diff --git a/lib/features/campaigns/models/marker_item_model.dart b/lib/features/campaigns/models/marker_item_model.dart
index 3febd04e..7b5bac2a 100644
--- a/lib/features/campaigns/models/marker_item_model.dart
+++ b/lib/features/campaigns/models/marker_item_model.dart
@@ -4,10 +4,17 @@ class MarkerItemModel {
   final LatLng location;
   final int? id;
   final String? status;
+  final bool isVirtual;
 
   const MarkerItemModel({
     required this.id,
     required this.status,
     required this.location,
-  });
+  }) : isVirtual = false;
+
+  MarkerItemModel.virtual({
+    required this.id,
+    this.status,
+    required this.location,
+  }) : isVirtual = true;
 }
diff --git a/lib/features/campaigns/models/posters/poster_create_model.dart b/lib/features/campaigns/models/posters/poster_create_model.dart
index adc26a72..a10d3efb 100644
--- a/lib/features/campaigns/models/posters/poster_create_model.dart
+++ b/lib/features/campaigns/models/posters/poster_create_model.dart
@@ -1,16 +1,65 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
 import 'dart:typed_data';
 
 import 'package:gruene_app/app/services/nominatim_service.dart';
+import 'package:json_annotation/json_annotation.dart';
 import 'package:maplibre_gl/maplibre_gl.dart';
 
+part 'poster_create_model.g.dart';
+
+@JsonSerializable()
 class PosterCreateModel {
-  final AddressModel address;
+  AddressModel address;
+
+  @LatLongConverter()
   final LatLng location;
+
+  @Uint8ListConverter()
   final Uint8List? photo;
 
-  const PosterCreateModel({
+  PosterCreateModel({
     required this.address,
     this.photo,
     required this.location,
   });
+
+  factory PosterCreateModel.fromJson(Map<String, dynamic> json) => _$PosterCreateModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$PosterCreateModelToJson(this);
+}
+
+/// Converts to and from [Uint8List] and [List]<[int]>.
+class Uint8ListConverter implements JsonConverter<Uint8List?, List<int>?> {
+  /// Create a new instance of [Uint8ListConverter].
+  const Uint8ListConverter();
+
+  @override
+  Uint8List? fromJson(List<int>? json) {
+    if (json == null) return null;
+
+    return Uint8List.fromList(json);
+  }
+
+  @override
+  List<int>? toJson(Uint8List? object) {
+    if (object == null) return null;
+
+    return object.toList();
+  }
+}
+
+/// Converts to and from [Uint8List] and [List]<[int]>.
+class LatLongConverter implements JsonConverter<LatLng, List<double>> {
+  /// Create a new instance of [LatLongConverter].
+  const LatLongConverter();
+
+  @override
+  LatLng fromJson(List<double> json) {
+    return LatLng(json[0], json[1]);
+  }
+
+  @override
+  List<double> toJson(LatLng object) {
+    return [object.latitude, object.longitude];
+  }
 }
diff --git a/lib/features/campaigns/models/posters/poster_detail_model.dart b/lib/features/campaigns/models/posters/poster_detail_model.dart
index ab0f98b0..7a4f77ec 100644
--- a/lib/features/campaigns/models/posters/poster_detail_model.dart
+++ b/lib/features/campaigns/models/posters/poster_detail_model.dart
@@ -1,4 +1,5 @@
 import 'package:gruene_app/app/services/nominatim_service.dart';
+import 'package:maplibre_gl/maplibre_gl.dart';
 
 enum PosterStatus { ok, damaged, missing, removed }
 
@@ -11,6 +12,8 @@ class PosterDetailModel {
   final String comment;
   final PosterStatus status;
   final String createdAt;
+  final bool isCached;
+  final LatLng location;
 
   PosterDetailModel({
     required this.id,
@@ -20,5 +23,7 @@ class PosterDetailModel {
     required this.status,
     required this.comment,
     required this.createdAt,
+    required this.location,
+    this.isCached = false,
   });
 }
diff --git a/lib/features/campaigns/models/posters/poster_update_model.dart b/lib/features/campaigns/models/posters/poster_update_model.dart
index 61d5c9f7..66b5b35c 100644
--- a/lib/features/campaigns/models/posters/poster_update_model.dart
+++ b/lib/features/campaigns/models/posters/poster_update_model.dart
@@ -1,14 +1,24 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
 import 'dart:typed_data';
 
 import 'package:gruene_app/app/services/nominatim_service.dart';
+import 'package:gruene_app/features/campaigns/models/posters/poster_create_model.dart';
 import 'package:gruene_app/features/campaigns/models/posters/poster_detail_model.dart';
+import 'package:json_annotation/json_annotation.dart';
+import 'package:maplibre_gl/maplibre_gl.dart';
 
+part 'poster_update_model.g.dart';
+
+@JsonSerializable()
 class PosterUpdateModel {
   final String id;
   final AddressModel address;
   final PosterStatus status;
   final String comment;
+  @Uint8ListConverter()
   final Uint8List? newPhoto;
+  @LatLongConverter()
+  final LatLng location;
   final bool removePreviousPhotos;
 
   PosterUpdateModel({
@@ -17,6 +27,31 @@ class PosterUpdateModel {
     required this.status,
     required this.comment,
     required this.removePreviousPhotos,
+    required this.location,
     this.newPhoto,
   });
+
+  factory PosterUpdateModel.fromJson(Map<String, dynamic> json) => _$PosterUpdateModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$PosterUpdateModelToJson(this);
+
+  PosterUpdateModel copyWith({
+    String? id,
+    AddressModel? address,
+    PosterStatus? status,
+    String? comment,
+    Uint8List? newPhoto,
+    LatLng? location,
+    bool? removePreviousPhotos,
+  }) {
+    return PosterUpdateModel(
+      id: id ?? this.id,
+      address: address ?? this.address,
+      status: status ?? this.status,
+      comment: comment ?? this.comment,
+      newPhoto: newPhoto ?? this.newPhoto,
+      location: location ?? this.location,
+      removePreviousPhotos: removePreviousPhotos ?? this.removePreviousPhotos,
+    );
+  }
 }
diff --git a/lib/features/campaigns/screens/doors_screen.dart b/lib/features/campaigns/screens/doors_screen.dart
index e5bc5cfd..59952db3 100644
--- a/lib/features/campaigns/screens/doors_screen.dart
+++ b/lib/features/campaigns/screens/doors_screen.dart
@@ -70,6 +70,7 @@ class _DoorsScreenState extends MapConsumer<DoorsScreen> {
       onMapCreated: onMapCreated,
       addPOIClicked: _addPOIClicked,
       loadVisibleItems: loadVisibleItems,
+      loadCachedItems: _loadCachedItems,
       getMarkerImages: _getMarkerImages,
       onFeatureClick: _onFeatureClick,
       onNoFeatureClick: _onNoFeatureClick,
@@ -146,4 +147,6 @@ class _DoorsScreenState extends MapConsumer<DoorsScreen> {
 
   Future<MarkerItemModel> _saveNewAndGetMarkerItem(DoorCreateModel newDoor) async =>
       await _grueneApiService.createNewDoor(newDoor);
+
+  void _loadCachedItems() {}
 }
diff --git a/lib/features/campaigns/screens/flyer_screen.dart b/lib/features/campaigns/screens/flyer_screen.dart
index 83e0c87e..76181ee8 100644
--- a/lib/features/campaigns/screens/flyer_screen.dart
+++ b/lib/features/campaigns/screens/flyer_screen.dart
@@ -62,6 +62,7 @@ class _FlyerScreenState extends MapConsumer<FlyerScreen> {
       onMapCreated: onMapCreated,
       addPOIClicked: _addPOIClicked,
       loadVisibleItems: loadVisibleItems,
+      loadCachedItems: _loadCachedItems,
       getMarkerImages: _getMarkerImages,
       onFeatureClick: _onFeatureClick,
       onNoFeatureClick: _onNoFeatureClick,
@@ -142,4 +143,6 @@ class _FlyerScreenState extends MapConsumer<FlyerScreen> {
     final updatedMarker = await campaignService.updateFlyer(flyerUpdate);
     mapController.setMarkerSource([updatedMarker]);
   }
+
+  void _loadCachedItems() {}
 }
diff --git a/lib/features/campaigns/screens/map_consumer.dart b/lib/features/campaigns/screens/map_consumer.dart
index 527f9372..fea94672 100644
--- a/lib/features/campaigns/screens/map_consumer.dart
+++ b/lib/features/campaigns/screens/map_consumer.dart
@@ -24,7 +24,7 @@ typedef SaveNewAndGetMarkerCallback<T> = Future<MarkerItemModel> Function(T);
 typedef GetPoiCallback<T> = Future<T> Function(String);
 typedef GetPoiDetailWidgetCallback<T> = Widget Function(T);
 typedef GetPoiEditWidgetCallback<T> = Widget Function(T);
-typedef OnDeletePoiCallback = void Function(String posterId);
+typedef OnDeletePoiCallback = Future<void> Function(String posterId);
 
 abstract class MapConsumer<T extends StatefulWidget> extends State<T> with FocusAreaInfo {
   late MapController mapController;
@@ -146,7 +146,7 @@ abstract class MapConsumer<T extends StatefulWidget> extends State<T> with Focus
     );
   }
 
-  void deletePoi(String poiId) async {
+  Future<void> deletePoi(String poiId) async {
     final id = int.parse(poiId);
     await campaignService.deletePoi(poiId);
     mapController.removeMarkerItem(id);
diff --git a/lib/features/campaigns/screens/poster_edit.dart b/lib/features/campaigns/screens/poster_edit.dart
index 59fb3983..35bab6dc 100644
--- a/lib/features/campaigns/screens/poster_edit.dart
+++ b/lib/features/campaigns/screens/poster_edit.dart
@@ -309,7 +309,7 @@ class _PosterEditState extends State<PosterEdit> with AddressExtension, ConfirmD
   }
 
   void _onDeletePressed() async {
-    widget.onDelete(widget.poster.id);
+    await widget.onDelete(widget.poster.id);
     _closeDialog(ModalEditResult.delete);
   }
 
@@ -336,6 +336,7 @@ class _PosterEditState extends State<PosterEdit> with AddressExtension, ConfirmD
       status: _segmentedButtonSelection.isEmpty ? PosterStatus.ok : _segmentedButtonSelection.single,
       comment: commentTextController.text,
       removePreviousPhotos: _isPhotoDeleted,
+      location: widget.poster.location,
       newPhoto: reducedImage,
     );
     await widget.onSave(updateModel);
diff --git a/lib/features/campaigns/screens/posters_screen.dart b/lib/features/campaigns/screens/posters_screen.dart
index 92d802e8..91919993 100644
--- a/lib/features/campaigns/screens/posters_screen.dart
+++ b/lib/features/campaigns/screens/posters_screen.dart
@@ -6,7 +6,9 @@ import 'package:gruene_app/app/services/enums.dart';
 import 'package:gruene_app/app/services/gruene_api_campaigns_service.dart';
 import 'package:gruene_app/app/services/nominatim_service.dart';
 import 'package:gruene_app/app/theme/theme.dart';
+import 'package:gruene_app/features/campaigns/helper/campaign_action_cache.dart';
 import 'package:gruene_app/features/campaigns/helper/campaign_constants.dart';
+import 'package:gruene_app/features/campaigns/helper/map_helper.dart';
 import 'package:gruene_app/features/campaigns/helper/media_helper.dart';
 import 'package:gruene_app/features/campaigns/models/marker_item_model.dart';
 import 'package:gruene_app/features/campaigns/models/posters/poster_create_model.dart';
@@ -72,6 +74,7 @@ class _PostersScreenState extends MapConsumer<PostersScreen> {
       onMapCreated: onMapCreated,
       addPOIClicked: _addPOIClicked,
       loadVisibleItems: loadVisibleItems,
+      loadCachedItems: _loadCachedItems,
       getMarkerImages: _getMarkerImages,
       onFeatureClick: _onFeatureClick,
       onNoFeatureClick: _onNoFeatureClick,
@@ -134,8 +137,11 @@ class _PostersScreenState extends MapConsumer<PostersScreen> {
     );
   }
 
-  Future<MarkerItemModel> saveNewAndGetMarkerItem(PosterCreateModel newPoster) async =>
-      await campaignService.createNewPoster(newPoster);
+  Future<MarkerItemModel> saveNewAndGetMarkerItem(PosterCreateModel newPoster) async {
+    return await CampaignActionCache().addPosterCreate(newPoster);
+
+    // return await campaignService.createNewPoster(newPoster);
+  }
 
   void _addPOIClicked(LatLng location) async {
     super.addPOIClicked<File, PosterAddScreen, PosterCreateModel>(
@@ -160,24 +166,29 @@ class _PostersScreenState extends MapConsumer<PostersScreen> {
     return poster;
   }
 
+  Future<PosterDetailModel> _getCachedPoi(String poiId) async {
+    final poster = await CampaignActionCache().getPoiAsPosterDetail(poiId);
+    return poster;
+  }
+
   Widget _getEditPosterWidget(PosterDetailModel poster) {
-    return PosterEdit(poster: poster, onSave: _savePoster, onDelete: deletePoi);
+    return PosterEdit(poster: poster, onSave: _savePoster, onDelete: _deletePoster);
   }
 
   void _onFeatureClick(dynamic rawFeature) async {
+    final feature = rawFeature as Map<String, dynamic>;
+    final isCached = MapHelper.extractIsCachedFromFeature(feature);
+
     getPoiDetailWidget(PosterDetailModel poster) {
       return PosterDetail(
         poi: poster,
       );
     }
 
-    super.onFeatureClick<PosterDetailModel>(
-      rawFeature,
-      _getPoi,
-      getPoiDetailWidget,
-      _getEditPosterWidget,
-      desiredSize: Size(150, 150),
-    );
+    var __getPoi = isCached ? _getCachedPoi : _getPoi;
+
+    super.onFeatureClick<PosterDetailModel>(rawFeature, __getPoi, getPoiDetailWidget, _getEditPosterWidget,
+      desiredSize: Size(150, 150),);
   }
 
   void _onNoFeatureClick(Point<double> point) {
@@ -185,7 +196,7 @@ class _PostersScreenState extends MapConsumer<PostersScreen> {
   }
 
   Future<void> _savePoster(PosterUpdateModel posterUpdate) async {
-    final updatedMarker = await campaignService.updatePoster(posterUpdate);
+    final updatedMarker = await CampaignActionCache().addPosterUpdate(posterUpdate);
     mapController.setMarkerSource([updatedMarker]);
   }
 
@@ -214,4 +225,14 @@ class _PostersScreenState extends MapConsumer<PostersScreen> {
       ),
     );
   }
+
+  void _loadCachedItems() {
+    var markerItems = CampaignActionCache().getPosterMarkerItems();
+    mapController.setMarkerSource(markerItems);
+  }
+
+  Future<void> _deletePoster(String posterId) async {
+    var markerItem = await CampaignActionCache().addPosterDelete(posterId);
+    mapController.setMarkerSource([markerItem]);
+  }
 }
diff --git a/lib/features/campaigns/widgets/map_container.dart b/lib/features/campaigns/widgets/map_container.dart
index 4ba44eee..cf5ed326 100644
--- a/lib/features/campaigns/widgets/map_container.dart
+++ b/lib/features/campaigns/widgets/map_container.dart
@@ -24,6 +24,7 @@ import 'package:maplibre_gl/maplibre_gl.dart';
 typedef OnMapCreatedCallback = void Function(MapController controller);
 typedef AddPOIClickedCallback = void Function(LatLng location);
 typedef LoadVisibleItemsCallBack = void Function(LatLng locationSW, LatLng locationNE);
+typedef LoadCachedItemsCallback = void Function();
 typedef LoadDataLayersCallBack = void Function(LatLng locationSW, LatLng locationNE);
 typedef GetMarkerImagesCallback = Map<String, String> Function();
 typedef OnFeatureClickCallback = void Function(dynamic feature);
@@ -36,6 +37,7 @@ class MapContainer extends StatefulWidget {
   final OnMapCreatedCallback? onMapCreated;
   final AddPOIClickedCallback? addPOIClicked;
   final LoadVisibleItemsCallBack? loadVisibleItems;
+  final LoadCachedItemsCallback? loadCachedItems;
   final LoadDataLayersCallBack? loadDataLayers;
   final GetMarkerImagesCallback? getMarkerImages;
   final OnFeatureClickCallback? onFeatureClick;
@@ -50,6 +52,7 @@ class MapContainer extends StatefulWidget {
     required this.onMapCreated,
     required this.addPOIClicked,
     required this.loadVisibleItems,
+    required this.loadCachedItems,
     required this.getMarkerImages,
     required this.onFeatureClick,
     required this.onNoFeatureClick,
@@ -182,10 +185,10 @@ class _MapContainerState extends State<MapContainer> implements MapController {
       onMapCreated(this);
     }
 
-    _loadDataOnMap();
+    _loadDataOnMap(init: true);
   }
 
-  void _loadDataOnMap() async {
+  void _loadDataOnMap({bool init = false}) async {
     final visRegion = await _controller?.getVisibleRegion();
     var currentZoomLevel = _controller!.cameraPosition!.zoom;
 
@@ -194,6 +197,10 @@ class _MapContainerState extends State<MapContainer> implements MapController {
 
     _showAddMarker = currentZoomLevel > minimumMarkerZoomLevel;
 
+    if (init) {
+      final loadCachedItems = widget.loadCachedItems;
+      if (loadCachedItems != null) loadCachedItems();
+    }
     final loadVisibleItems = widget.loadVisibleItems;
     if (loadVisibleItems != null) {
       loadVisibleItems(visRegion.southwest, visRegion.northeast);
diff --git a/lib/features/campaigns/widgets/map_with_location.dart b/lib/features/campaigns/widgets/map_with_location.dart
index 6131f19b..f9e27092 100644
--- a/lib/features/campaigns/widgets/map_with_location.dart
+++ b/lib/features/campaigns/widgets/map_with_location.dart
@@ -6,6 +6,7 @@ class MapWithLocation extends StatelessWidget {
   final OnMapCreatedCallback? onMapCreated;
   final AddPOIClickedCallback? addPOIClicked;
   final LoadVisibleItemsCallBack? loadVisibleItems;
+  final LoadCachedItemsCallback? loadCachedItems;
   final LoadDataLayersCallBack? loadDataLayers;
   final GetMarkerImagesCallback? getMarkerImages;
   final OnFeatureClickCallback? onFeatureClick;
@@ -18,6 +19,7 @@ class MapWithLocation extends StatelessWidget {
     required this.onMapCreated,
     required this.addPOIClicked,
     required this.loadVisibleItems,
+    required this.loadCachedItems,
     required this.getMarkerImages,
     required this.onFeatureClick,
     required this.onNoFeatureClick,
@@ -42,6 +44,7 @@ class MapWithLocation extends StatelessWidget {
           onMapCreated: onMapCreated,
           addPOIClicked: addPOIClicked,
           loadVisibleItems: loadVisibleItems,
+          loadCachedItems: loadCachedItems,
           getMarkerImages: getMarkerImages,
           onFeatureClick: onFeatureClick,
           onNoFeatureClick: onNoFeatureClick,
diff --git a/lib/main.dart b/lib/main.dart
index 55c9465d..24a81373 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -10,6 +10,7 @@ import 'package:gruene_app/app/auth/bloc/auth_bloc.dart';
 import 'package:gruene_app/app/auth/repository/auth_repository.dart';
 import 'package:gruene_app/app/router.dart';
 import 'package:gruene_app/app/services/gruene_api_core.dart';
+import 'package:gruene_app/app/services/object_box.dart';
 import 'package:gruene_app/app/theme/theme.dart';
 import 'package:gruene_app/features/mfa/bloc/mfa_bloc.dart';
 import 'package:gruene_app/features/mfa/bloc/mfa_event.dart';
@@ -19,7 +20,7 @@ import 'package:gruene_app/swagger_generated_code/gruene_api.swagger.dart';
 import 'package:keycloak_authenticator/api.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
-void main() async {
+Future<void> main() async {
   await dotenv.load(fileName: '.env');
   WidgetsBinding widgetsBinding = WidgetsFlutterBinding.ensureInitialized();
   FlutterNativeSplash.preserve(widgetsBinding: widgetsBinding);
@@ -37,6 +38,10 @@ void main() async {
 
   GetIt.I.registerSingleton<GrueneApi>(await createGrueneApiClient());
   GetIt.I.registerFactory<AuthenticatorService>(MfaFactory.create);
+  // This is required so ObjectBox can get the application directory
+  // to store the database in.
+  WidgetsFlutterBinding.ensureInitialized();
+  await ObjectBox.init();
 
   runApp(TranslationProvider(child: const MyApp()));
 }
diff --git a/lib/objectbox_generated_code/objectbox-model.json b/lib/objectbox_generated_code/objectbox-model.json
new file mode 100644
index 00000000..f09fd1d3
--- /dev/null
+++ b/lib/objectbox_generated_code/objectbox-model.json
@@ -0,0 +1,54 @@
+{
+  "_note1": "KEEP THIS FILE! Check it into a version control system (VCS) like git.",
+  "_note2": "ObjectBox manages crucial IDs for your object model. See docs for details.",
+  "_note3": "If you have VCS merge conflicts, you must resolve them according to ObjectBox docs.",
+  "entities": [
+    {
+      "id": "1:3687273696335832918",
+      "lastPropertyId": "6:2592599006203626727",
+      "name": "CampaignAction",
+      "properties": [
+        {
+          "id": "1:632207665298233006",
+          "name": "id",
+          "type": 6,
+          "flags": 1
+        },
+        {
+          "id": "2:1016599410622369215",
+          "name": "poiId",
+          "type": 6
+        },
+        {
+          "id": "3:7857996364901107513",
+          "name": "poiTempId",
+          "type": 6
+        },
+        {
+          "id": "4:4161217532734178868",
+          "name": "serialized",
+          "type": 9
+        },
+        {
+          "id": "6:2592599006203626727",
+          "name": "actionTypeValue",
+          "type": 6
+        }
+      ],
+      "relations": []
+    }
+  ],
+  "lastEntityId": "1:3687273696335832918",
+  "lastIndexId": "0:0",
+  "lastRelationId": "0:0",
+  "lastSequenceId": "0:0",
+  "modelVersion": 5,
+  "modelVersionParserMinimum": 5,
+  "retiredEntityUids": [],
+  "retiredIndexUids": [],
+  "retiredPropertyUids": [
+    6954020076197261999
+  ],
+  "retiredRelationUids": [],
+  "version": 1
+}
\ No newline at end of file
diff --git a/pubspec.lock b/pubspec.lock
index c88f6d5a..37ba8c66 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -358,6 +358,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  flat_buffers:
+    dependency: transitive
+    description:
+      name: flat_buffers
+      sha256: "380bdcba5664a718bfd4ea20a45d39e13684f5318fcd8883066a55e21f37f4c3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "23.5.26"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -996,6 +1004,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
+  objectbox:
+    dependency: "direct main"
+    description:
+      name: objectbox
+      sha256: ea823f4bf1d0a636e7aa50b43daabb64dd0fbd80b85a033016ccc1bc4f76f432
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.3"
+  objectbox_flutter_libs:
+    dependency: "direct main"
+    description:
+      name: objectbox_flutter_libs
+      sha256: c91350bbbce5e6c2038255760b5be988faead004c814f833c2cd137445c6ae70
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.3"
+  objectbox_generator:
+    dependency: "direct dev"
+    description:
+      name: objectbox_generator
+      sha256: "96da521f2cef455cd524f8854e31d64495c50711ad5f1e2cf3142a8e527bc75f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.3"
   package_config:
     dependency: transitive
     description:
@@ -1021,7 +1053,7 @@ packages:
     source: hosted
     version: "3.0.2"
   path:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path
       sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
@@ -1037,13 +1069,13 @@ packages:
     source: hosted
     version: "1.0.2"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
-      sha256: fec0d61223fba3154d87759e3cc27fe2c8dc498f6386c6d6fc80d1afdd1bf378
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
+    version: "2.1.5"
   path_provider_android:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index fc923012..3ea81382 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -59,6 +59,10 @@ dependencies:
   timeago: ^3.7.0
   local_auth: ^2.3.0
   image_picker: ^1.1.2
+  objectbox: ^4.0.3
+  objectbox_flutter_libs: any
+  path_provider: ^2.1.5
+  path: ^1.9.0
 
 dev_dependencies:
 
@@ -69,12 +73,12 @@ dev_dependencies:
   # rules and activating additional ones.
   flutter_lints: ^5.0.0
 #--------- swagger_dart_code_generator --------------
-  build_runner: ^2.3.3
+  build_runner: ^2.4.13
   chopper_generator: ^8.0.0
   json_serializable: ^6.6.1
   swagger_dart_code_generator: ^3.0.1
 #----------------------------------------------------
-
+  objectbox_generator: any
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
@@ -95,6 +99,8 @@ flutter:
     - assets/maps/
     - .env
 
+objectbox:
+  output_dir: objectbox_generated_code
 
   # To add assets to your application, add an assets section, like this:
   # assets: