Kotoba Boost

Contains adsIn-app purchases
1K+
Downloads
Content rating
Everyone
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About this app

Kotoba Boost is an application that contains numerous sets of words based on popular culture . The quizzes are carefully built by applying smart answer sets to fully challenge your knowledge.

Feature highlights include:

โ˜… Tier based progression to help learn in steps;
โ˜… Smart word delivery that targets your weaker vocabulary knowledge via spaced repetition;
โ˜… Speech entry options to practice pronunciation;
โ˜… Theme based word groupings to make learning fun and practical;
โ˜… Flexible configuration options allowing for beginner and advanced modes;
โ˜… Notes and grammar references to help extend knowledge;

Current Deck Categories Include:

โ˜… Japanese Language Proficiency Test (JLPT) N5
โ˜… Japanese Language Proficiency Test (JLPT) N4
โ˜… Yuru Camp (ใ‚†ใ‚‹ใ‚ญใƒฃใƒณโ–ณ)
โ˜… Momotaro (ใ‚‚ใ‚‚ใŸใ‚)
โ˜… Demon Slayer (้ฌผๆป…ใฎๅˆƒ - Kimetsu no Yaiba)
โ˜… World Trigger (ใƒฏใƒผใƒซใƒ‰ใƒˆใƒชใ‚ฌใƒผ)

Please send bug reports or comments to feedback@lusil.net.
Updated on
Aug 18, 2025

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
This app may collect these data types
Personal info
Data is encrypted in transit
You can request that data be deleted
Committed to follow the Play Families Policy

Whatโ€™s new

โ˜… Ability to force update decks from settings.
โ˜… Minor bug and typo fixes.