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Kiten vs Renshuu: catalog facts
Kiten	Renshuu
Free Free and open source under the GPL-2.0-or-later licence.	Freemium Free to start learning, with optional paid features.
Windows, Linux	Android, iOS, Web
English-Japanese and Japanese-English dictionaries Kanji dictionary with several lookup methods	Vocabulary, kanji and grammar in one place Dictionaries filterable by JLPT level
Built around KDE, so it looks most at home on a Plasma desktop Focused on lookup rather than structured lessons	Japanese only Requires an account to track progress
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-2.0-or-later	License not stated
No account needed	Account 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 September 24, 2026

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