Compare software

Gridlink Mail vs Simple Email: catalog facts
Gridlink Mail	Simple Email
Free Free and open source under GPL-3.0.	Free Free software under the GPL-3.0 license.
Android	Android
Supports JMAP and classic IMAP and SMTP Includes JMAP contacts and calendar support with CardDAV and CalDAV alternatives	Unified inbox for multiple accounts Offline storage and operations
Android only A fork of Sterna Mail with a separate release and support path	Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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