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Diarium vs ReminDiary: catalog facts
Diarium	ReminDiary
Freemium Free to start; Diarium Pro is a one-time purchase per platform.	Free Free and open source under the GPL 3.0 licence.
Windows, macOS, Android, iOS	Android
No account needed to start Sync through your own OneDrive, Google Drive, Dropbox, iCloud or WebDAV	Shows past entries from the same date after saving Fully offline with no account
Pro must be bought separately on each platform Closed source	No sync between devices One entry per day only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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