A calm, well-crafted fasting companion for iPhone and Apple Watch. Live on your Lock Screen, on your wrist, in the Dynamic Island — with real tracking, research-backed phase explanations, and an interface designed to stay out of your way.
Native Apple Watch app. Live Activity in the Dynamic Island and on your Lock Screen. Home Screen widgets. No matter where you look, your fast is there.
Tap any metabolic phase for a plain-English explanation grounded in peer-reviewed research. Honest language — no miracle claims.
Weight, waist, mood, hydration. Apple Health sync. A calendar heatmap of every fast you've finished.
One-time purchase. No subscriptions, no accounts, no analytics, no tracking. Multiple themes to make it yours. Your data never leaves your phone.
A handful of themes — some free from day one, more as you go.
$4.99, once. No subscriptions, no upsells, no ads.
No accounts. Nothing to sign up for, ever.
No tracking. No analytics, no telemetry, no third parties.
Your data lives on your device. That's the whole policy.
$4.99. One-time. iPhone & Apple Watch.
Download on the App Store