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Zero vs Lifesum: catalog facts
Zero	Lifesum
Freemium Free to download, with a paid subscription for additional features.	Freemium Free to use, with paid features available.
Android, iOS	Android, iOS, Web
One-tap fasting timer Meal logging by photo or text description	Structured diet plans including keto and Mediterranean Available on mobile and the web
Mobile only, no web version Less detailed nutrient tracking than full calorie counters	Some plans and features require payment
Downloadable app	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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