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Nirvana vs Trayzero: catalog facts
Nirvana	Trayzero
Freemium Free to start, with paid features offered on top.	Free Free and open source under the GPL 3.0.
Web	Android
Built directly around the GTD inbox, next actions and projects workflow Context tags for filtering tasks by place or situation	Designed around the GTD workflow Capture button on every screen and capture from the share menu
Less useful if you do not follow GTD Hosted service, so tasks are stored on the developer's servers	Android only No mention of sync between devices
Web application, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-only
Account needed	No account needed
Not stated if it 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.