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Komikku vs Futon: catalog facts
Komikku	Futon
Free Free and open source.	Free Free and open source under the GPL-3.0 licence, with no ads.
Android	Android
Free and open source Extension system for adding sources	Over 1000 manga sources plus Tachiyomi keiyoushi extensions Chapter downloads for offline reading
Android only Not distributed through Google Play	Android only Relies on third-party sources that can change or break
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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