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Product

Platform

adaptive

Users

People who use emulation on retro handhelds and want to reclaim storage or automate repetitive library work, such as creating M3U playlists for multi-disc games.

Product Purpose

Mimir is an open-source, local-first toolkit for safely organising retro ROM libraries. It helps people prepare and maintain libraries from one central app, with a preview before any change is applied.

Positioning

Mimir brings ROM organisation, conversion, frontend preparation, and PS Vita shortcut creation into one simple cross-platform app rather than requiring separate tools and manual file work.

Operating Context

Users select folders on Android devices or desktop computers and review planned file changes before applying them. Mimir supports ROM organisers and converters, frontend-specific M3U output rules, PS Vita shortcuts, ES-DE custom-system setup, and desktop ScummVM launcher generation.

Capabilities and Constraints

  • All file operations run locally on the device; there is no cloud sync or account system.
  • Safety comes from preview-and-confirm workflows, deterministic operations, and conflict skipping.
  • Android targets API 29 and above with ARM64 native converter binaries; desktop targets use platform-specific converter bundles.
  • Web and iOS are out of scope because Mimir requires direct local filesystem access and bundled converter executables.
  • Frontend compatibility is prioritised, with current support for ES-DE and generic output presets.

Brand Commitments

  • Product name: Mimir.
  • Keep the experience simple and centralised.
  • Mimir is open source and is associated with the RetroPup creator channel.

Evidence on Hand

  • The repository README documents current features, supported formats, and legal constraints.
  • The repository contains the Flutter application, platform adapters, shared Dart core, unit tests, converter backends, license texts, and PS Vita shortcut data.
  • No testimonials, customer claims, benchmark results, or pricing information are available for use.

Product Principles

  1. Keep ROM-library maintenance simple.
  2. Consolidate common handheld-emulation tasks in one place.
  3. Preserve user control through clear previews and confirmation.
  4. Work locally, without accounts or cloud dependency.
  5. Prefer predictable, frontend-compatible output.

Accessibility & Inclusion

  • Follow each target platform’s accessibility expectations, using Material components, system font scaling, keyboard focus where available, and minimum touch-target sizes.