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Nihonoari vs Renshuu: catalog facts
Nihonoari	Renshuu
Free Free and open source under the GPL-3.0 licence, with no ads or in-app purchases.	Freemium Free to start learning, with optional paid features.
Android	Android, iOS, Web
Focused only on Hiragana and Katakana practice No adverts or in-app purchases	Vocabulary, kanji and grammar in one place Dictionaries filterable by JLPT level
Covers kana only, not kanji or vocabulary No GitHub releases; installed through F-Droid	Japanese only Requires an account to track progress
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.