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FastTrack vs Solo Forge: catalog facts
FastTrack	Solo Forge
Free Free and open source under the MIT licence, with no ads or in-app purchases.	Free Free and open source under the GPL-3.0, with no ads.
Android	Android
No ads, purchases or permissions Shows what the body is doing at each stage of a fast	Fasting, calorie, weight and workout tracking in one app No accounts, analytics or crash reporting
Android only Not a medical app	Android only Small, young project with a single main developer
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
Not stated if an account is 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.