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todo.txt vs sleek: catalog facts
todo.txt	sleek
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	Windows, macOS, Linux
Tasks stored in a plain text file you own Simple format readable in any editor	Tasks kept in plain todo.txt files you own Runs on Linux, Windows and macOS
Terminal only, no graphical interface No built-in reminders or recurring tasks	Limited to what the todo.txt format can express
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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