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Mini Diarium vs Diarium: catalog facts
Mini Diarium	Diarium
Free Free and open source under the MIT licence.	Freemium Free to start; Diarium Pro is a one-time purchase per platform.
Windows, macOS, Linux	Windows, macOS, Android, iOS
AES-256-GCM encryption of every entry No network access or telemetry	No account needed to start Sync through your own OneDrive, Google Drive, Dropbox, iCloud or WebDAV
No sync between devices Name change announced, so the branding will shift	Pro must be bought separately on each platform Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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