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