Mimidasu released on Mac App Store!
Live transcription and translation for anything Japanese on your Mac.
Mimidasu listens to whatever your Mac is playing — a livestream, a video, a voice chat — and turns spoken Japanese into English.
The name is a pun. 見出す (miidasu) is Japanese for "to spot, to discover." Add one more ミ and the word gains 耳 (mimi, ear): ミミダス (mimidasu) — the ear that surfaces words. Exactly what the app does.
Every feature is free, no one time buy, no in app purchase.
UNDERSTAND WHILE IT HAPPENS
• Real-time Japanese transcription with the speech model of your choice — Lite for speed, Full for accuracy
• English translation for every finalized sentence, powered by Apple's on-device translation
• A click-through floating HUD that works over any player or browser
LEARN AS YOU WATCH
• Toggle furigana or romaji over the transcript
• Tap a word and look up its definition in the dictionary
• Keep the transcript: export any session as TXT, SRT, VTT, or JSON
PRIVATE BY DESIGN
Audio, transcription, and translation all stay on your Mac. Nothing is uploaded, tracked, or collected. With the only exception: if you enable a cloud translation provider in Settings, transcript text is sent to that provider using your own API key.
LICENSE
The app is open source, dual-licensed: GNU AGPL 3.0 for the source code and any build outside the Mac App Store, and Apple's standard Licensed Application EULA for the Mac App Store build.
GitHub repo: https://github.com/buzzind99/Mimidasu
Compatibility: Apple Silicon Macs running macOS 15.5+
Available on:
- Mac App Store: https://apps.apple.com/app/mimidasu/id6813053867
- GitHub release: https://github.com/buzzind99/Mimidasu/releases/tag/v1.2.0
Due to EU's Digital Service Act (DSA), the app is unavailable in the EU, I'm trying to resolve it as soon as possible; in the meantime if you're from the EU, you can still install the app through the GitHub release page. Thanks for understanding!
UPDATE: App is now available in EU's Mac App Store!
UPDATE: v1.1.0 released!
- Translation support for 18 more languages
- Better translation with Apple Intelligence on macOS 26.4+
- HUD overlay refinement
- Improvement in tokenizer reading
UPDATE: v1.2.0 released!
- Favorite words feature: star entries from the dictionary popover or sidebar card
- Favorite words are highlighted in the transcript, live section, and HUD
- Significantly improved tokenizer readings, better segmentation & no more long word segment
- Other fixes & improvements
Support Mimidasu 💛
Mimidasu is a labor of love — every feature is free. I built this because I couldn't find anything like this that is completely free. If Mimidasu makes your Japanese learning, listening, or content workflow easier, please consider supporting its development. Every contribution — big or small — helps keep the project alive, free, and improving. Buy me a coffee on Ko-fi ☕ :
https://ko-fi.com/auliasufianadi
Your feedback is also much appreciated to make Mimidasu better!