MaruDex - Japanese OCR Mining

Content rating
Everyone
100+
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Content rating
Everyone
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About this app

Mine Japanese from everything you play, read, or watch!

One press to scan your entire screen and analyze any Japanese text. One button to add any kanji or vocabulary to your MaruMori SRS queue.

The process:
1. Tap the floating button
MaruDex analyzes whatever is currently showing on your screen, across any app, including fullscreen games, ereader apps, manga apps and so on!

2. Tap & See Definitions
Tap on a text region, and MaruDex parses it one word at a time, showing kanji, vocabulary, conjugation details and sentence structure.

3. Tap + to mine
One tap sends a word or kanji straight to your custom MaruMori study lists for SRS-based study.
Quickly look up and study any word and kanji on your screen!
Updated on
Jul 4, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

- Tapping on a word in a red box will now open the lookup window with that particular word selected.
- Added three size options for the lookup window in Advanced Settings
- Better OCR results for high resolution devices where text overlaps multiple "tiles".
- Lookup History - You can now retry/refresh data for items you previously looked up (e.g. while offline).
- Fixed an issue with certain kanji not showing up as results.
- Fixed an issue where the floating bubble size setting wouldn't work
Content rating
Everyone
Learn more

App support

About the developer
Devloop
support@marumori.io
Merijntje Gijzenstraat 76 4906 EB Oosterhout NB Netherlands
+31 970 105 86753

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