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Journalize vs Diarium: catalog facts
Journalize	Diarium
Free Free and open source under the GPL-3.0 licence.	Freemium Free to start; Diarium Pro is a one-time purchase per platform.
Android	Windows, macOS, Android, iOS
Markdown rendering with images Tags and search across entries	No account needed to start Sync through your own OneDrive, Google Drive, Dropbox, iCloud or WebDAV
Android only Small project with a single developer	Pro must be bought separately on each platform Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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