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Solo Forge vs Yazio: catalog facts
Solo Forge	Yazio
Free Free and open source under the GPL-3.0, with no ads.	Freemium Free to use, with a paid subscription for additional features.
Android	Android, iOS, Web
Fasting, calorie, weight and workout tracking in one app No accounts, analytics or crash reporting	Food logging by photo, barcode or manual entry Built-in fasting timers with 16:8, 5:2 and 6:1 plans
Android only Small, young project with a single main developer	Closed-source service AI photo estimates may need manual correction
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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