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todo.txt vs TTDL: catalog facts
todo.txt	TTDL
Free Free and open source.	Free Free and open source under the MIT licence.
macOS, Linux, Command line	Windows, Command line
Tasks stored in a plain text file you own Simple format readable in any editor	Uses the plain text todo.txt format, readable in any editor Works entirely in the terminal
Terminal only, no graphical interface No built-in reminders or recurring tasks	Command-line only, with no graphical interface No built-in sync; syncing the file is up to you
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
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.