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ImapNotes3 vs NotallyX: catalog facts
ImapNotes3	NotallyX
Free Free and open source under the GPL-3.0.	Free Free and open source.
Android	Android
Syncs through any IMAP mailbox you already have Notes stored as standard HTML emails	Notes and checklists in a minimal interface Labels for organizing notes
Needs an email account with IMAP access Android only	Android only No sync service of its own
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Account needed	No account 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 1, 2026

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