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Diarium vs DailyTxT: catalog facts
Diarium	DailyTxT
Freemium Free to start; Diarium Pro is a one-time purchase per platform.	Free Free and open source under the MIT licence.
Windows, macOS, Android, iOS	Web, Self-hosted
No account needed to start Sync through your own OneDrive, Google Drive, Dropbox, iCloud or WebDAV	Entries and uploads encrypted at rest Markdown with live preview
Pro must be bought separately on each platform Closed source	Upgrading from version 1 requires a manual migration Single-purpose diary rather than a general notes app
Downloadable app	Self-hosted
Closed source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it 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.