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todotxt.net vs topydo: catalog facts
todotxt.net	topydo
Free Free and open source, with optional donations.	Free Free and open source under the GPL-3.0 licence.
Windows	Command line
Single-key shortcuts for almost every action Tasks stay in a plain text file you control	Plain todo.txt file readable by other tools Due dates, dependencies and recurring tasks
Windows only No built-in sync; file syncing must be handled separately	Terminal only, no graphical or mobile app Extended tags may not be understood by other todo.txt tools
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause-FreeBSD	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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