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Tasks.org vs Microsoft To Do: catalog facts
Tasks.org	Microsoft To Do
Free Free and open source under the GPLv3, supported by donations.	Free Free to use from Microsoft.
Android	Windows, macOS, Android, iOS, Web
Many sync backends, including CalDAV and EteSync Works fully offline	Free with no paid tier needed for the app itself Works with Outlook tasks and Microsoft Planner
Desktop version is still in alpha Mainly an Android app	Closed source and tied to Microsoft's services Most useful for people already in the Microsoft 365 ecosystem
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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