Streaks That Matter
Build consistency, not guilt. ArcFast tracks your fasting streaks so you can see your progress at a glance. Miss a day? Pick up where you left off — no judgment, no reset penalties.
ArcFast
Fasting tracker that keeps you in the zone.
A fasting timer built around streaks, metabolic phases, and privacy. No account required. No data leaves your phone.
Coming to the App Store
Free to start. Premium plans available.
Features
Private by Design
No account. No cloud sync. No analytics. ArcFast stores everything on your device using local storage only. We can't see your data because we never collect it.
Simple by Default
Start a fast. Watch the timer. Done. No onboarding flows, no tutorial screens, no social features you didn't ask for. Open the app and you're fasting in two seconds.
Metabolic Phases
See where you are in the fasting cycle — from fed state through fat burning to autophagy. Based on established fasting science, displayed clearly so you know what's happening in your body.
Your data stays on your device. Always.
ArcFast has no servers, no accounts, and no analytics. We don't collect, transmit, or store any personal information. Your fasting data exists only on your phone — and it stays that way.
Health Disclaimer
ArcFast is not medical advice. Consult your healthcare provider before starting any fasting regimen, especially if you have a medical condition, take medication, are pregnant or nursing, or have a history of eating disorders.