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FairEmail vs InboxPager: catalog facts
FairEmail	InboxPager
Free Free to download from Google Play, F-Droid or GitHub releases.	Free Free and open source under GPL-3.0.
Android	Android
Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in	Supports IMAP, POP and SMTP over SSL/TLS Handles attachments and unread-message tracking
No Microsoft Exchange Web Services or ActiveSync support Android only	Requires an email server that supports SSL/TLS.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is 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 October 8, 2026

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