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sleek vs todotxt.net: catalog facts
sleek	todotxt.net
Free Free and open source.	Free Free and open source, with optional donations.
Windows, macOS, Linux	Windows
Tasks kept in plain todo.txt files you own Runs on Linux, Windows and macOS	Single-key shortcuts for almost every action Tasks stay in a plain text file you control
Limited to what the todo.txt format can express	Windows only No built-in sync; file syncing must be handled separately
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-2-Clause-FreeBSD
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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