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FairEmail vs Aqua Mail: catalog facts
FairEmail	Aqua Mail
Free Free to download from Google Play, F-Droid or GitHub releases.	Freemium Free to try, with a paid purchase that removes ads and unlocks more features.
Android	Android
Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in	Works with any IMAP or POP3 account alongside the major providers Does not route mail or passwords through its own cloud
No Microsoft Exchange Web Services or ActiveSync support Android only	Free version shows ads Android only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is 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 23, 2026

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