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