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Kana vs Nihonoari: catalog facts
Kana	Nihonoari
Free Free and open source under the GPL-3.0 or later licence.	Free Free and open source under the GPL-3.0 licence, with no ads or in-app purchases.
Linux	Android
Focused on learning Japanese characters Simple desktop app	Focused only on Hiragana and Katakana practice No adverts or in-app purchases
Covers characters only, not a full language course Linux only	Covers kana only, not kanji or vocabulary No GitHub releases; installed through F-Droid
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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