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ImapNotes3 vs ciphernotes: catalog facts
ImapNotes3	ciphernotes
Free Free and open source under the GPL-3.0.	Free Open source under the AGPL-3.0; the research does not mention paid plans.
Android	Android, Self-hosted
Syncs through any IMAP mailbox you already have Notes stored as standard HTML emails	Notes are encrypted on the device before syncing Works offline with cloud sync
Needs an email account with IMAP access Android only	Small project with few users so far No tagged releases on GitHub
Downloadable app	Downloadable app, Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
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 2, 2026	Official website Full listing and sources Checked October 2, 2026

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