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Ao vs Microsoft To Do: catalog facts
Ao	Microsoft To Do
Free Free and open source under the MIT license.	Free Free to use from Microsoft.
Windows, macOS, Linux	Windows, macOS, Android, iOS, Web
Customizable local and global keyboard shortcuts Dark, black, and sepia themes	Free with no paid tier needed for the app itself Works with Outlook tasks and Microsoft Planner
Requires a Microsoft To Do account	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: MIT	License not stated
Not stated if an account is 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 October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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