Compare software

Zero vs Fastic: catalog facts
Zero	Fastic
Freemium Free to download, with a paid subscription for additional features.	Freemium Free to download; pricing details are not stated on the homepage.
Android, iOS	Android, iOS
One-tap fasting timer Meal logging by photo or text description	Fasting timer combined with meal tracking Food scan for logging meals from a photo
Mobile only, no web version Less detailed nutrient tracking than full calorie counters	Built around one dieting approach Pricing not stated on the homepage
Downloadable app	Downloadable app
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 24, 2026

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