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Librera Reader vs Komikku: catalog facts
Librera Reader	Komikku
Free Free to download.	Free Free and open source.
Android	Android
Wide format support including DjVu and comics Auto-scan of book folders with reading progress	Free and open source Extension system for adding sources
Android only Many settings can take time to learn	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 September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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