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ntodotxt vs topydo: catalog facts
ntodotxt	topydo
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0 licence.
Android	Command line
Uses the open todo.txt plain-text format Works locally without any account	Plain todo.txt file readable by other tools Due dates, dependencies and recurring tasks
Android is the only listed platform No hosted sync service of its own	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: MIT	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.