Android 8.0+
Audio capture needs Android 10 or newer. Screen sharing uses the standard Android 14/15 app picker when it is available.
Read Japanese. Mine the sentence.
A native Android sentence miner for games, videos and paper books. OCR the screen, tap a word, and send the whole line to Anki — with the character's voice and a screenshot.
Droid Sentence Miner is a free, open-source Android app for learning Japanese through immersion. It captures text that is already on your screen — a game’s dialogue box, a YouTube hardsub, a manga page — and turns it into a dictionary lookup and a complete Anki card.
It is inspired by GameSentenceMiner and built around Yomitan dictionaries.
What you need
Section titled “What you need”Anki
AnkiDroid on the same phone, or desktop Anki with the AnkiConnect add-on on your network.
Dictionaries
Install Jitendex, JMdict or Kanjium pitch accents with one tap, or import any Yomitan format 3 zip.
No root
Everything uses normal Android screen-sharing consent. No root, no emulator, no desktop companion.
Start here
Section titled “Start here”Install the APKDownload a signed release and allow installs from your browser.
Mine your first cardDictionaries, OCR models, Anki, then one complete card.
Auto OCRDraw text areas once and let the app follow the game.
TroubleshootingCapture, audio, overlay and Anki problems, with fixes.
How it fits together
Section titled “How it fits together”MediaProjection → screen capture → OCR (meikiocr / ML Kit) → line tracker ↓Yomitan dictionary database ← deinflection ← lookup ← text log + screenshot + voice clip ↓ AnkiDroid API or AnkiConnectEvery part runs on the phone. Dictionaries and the Japanese OCR model are downloaded once; after that, reading, lookup and card building work offline. See How it works for the details.