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Slow Mail vs FairEmail: catalog facts
Slow Mail	FairEmail
Free Free and open source under the MIT licence.	Free Free to download from Google Play, F-Droid or GitHub releases.
Android	Android
No emails or message lists stored on the device Works with any IMAP and SMTP provider	Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in
Needs an active internet connection to read mail Slower than clients with a local cache	No Microsoft Exchange Web Services or ActiveSync support Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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