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Petals vs Quitter: catalog facts
Petals	Quitter
Free Free and open source under the AGPL-3.0 licence.	Free Free and open source under the MIT license.
Android	Android
No account or sign-up Supports quitting, tolerance breaks or gradual reduction	Tracks multiple goals and custom habits Includes milestones, journaling, and notifications
Android only Focused solely on cannabis use	Available as an Android app
Downloadable app	Downloadable app, Web application
Open source	Open source
License: AGPL-3.0-or-later	License: MIT
No 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 8, 2026

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