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Tasks.org vs Todosian: catalog facts
Tasks.org	Todosian
Free Free and open source under the GPLv3, supported by donations.	Free Free and open source under the Apache-2.0 licence.
Android	Android
Many sync backends, including CalDAV and EteSync Works fully offline	Works directly on existing Markdown files No account or database import
Desktop version is still in alpha Mainly an Android app	No built-in sync, so a separate sync tool is needed Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: Apache-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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