Burn Fasting

Private by design. No account, no ads, no tracking, just the cleanest fasting timer on iPhone. Start your first fast in seconds and watch your body transform.

Burn. The private intermittent fasting tracker.

No account. No ads. No sign-up. Just fasting, done properly. Start your first fast in seconds and watch your body transform through every biological stage — from Fed to Autophagy.

YOUR BODY. YOUR DATA. Burn collects nothing and requires no sign-up. Your fasting history stays on your device, always. No email, no analytics, no noise.

EVERY STAGE, TRACKED IN REAL TIME Time any fasting protocol — 16:8, 18:6, 20:4, OMAD, or a custom window. Burn shows you exactly where your body is at every hour of your fast:

• Fed — your body processes your last meal
• Catabolic — insulin drops and fat burning begins
• Fat Burning — your body switches to stored fat as fuel
• Ketosis — deep fat oxidation and mental clarity
• Autophagy — cellular repair and regeneration

Understand what your body is doing. Stay motivated. Get results.

BODY SCORE A single number that reflects your fasting consistency and physical progress — a smarter, more complete measure than the scale alone. Log your weight, track your trends, and watch your score climb as your habits compound.

BUILT FOR YOUR WHOLE DAY

• Apple Watch app — start, stop, and track from your wrist
• Home Screen widgets — fasting progress always visible
• Lock Screen widgets — check progress without unlocking
• Live Activities — your fast on the Dynamic Island
• HealthKit sync — fasting integrated with your health records
• Streaks and badges — stay consistent, celebrate milestones
• Charts and trends — weekly and monthly patterns at a glance
• Smart notifications — fast start, stage changes, completion
• iCloud backup — never lose your history
• Dark mode — easy on the eyes, day or night

POPULAR FASTING PROTOCOLS

• 16:8 — fast 16 hours, eat within an 8-hour window
• 18:6 — extended fasting for accelerated fat loss
• 20:4 — advanced protocol for experienced fasters
• OMAD (23:1) — one meal a day, maximum benefit
• Custom — set any fasting window that fits your life

WHY INTERMITTENT FASTING? Intermittent fasting is one of the most effective, natural approaches to fat loss, metabolic health, insulin sensitivity, and longevity. Whether you're fasting to lose weight, trigger autophagy, build mental clarity, or simply rebuild a cleaner relationship with food — Burn gives you the tools to stay on track without the clutter.

FREE TO START. PRO FOR MORE. The core fasting timer is completely free, with no usage limits and no pressure. Burn Pro unlocks Body Score, advanced insights, the Apple Watch app, widgets, full history editing, and detailed fasting analytics.

Whether you're new to intermittent fasting or a seasoned practitioner looking for a cleaner, faster, more private tool — Burn stays out of your way and lets your results do the talking.

Download Burn and start your first fast today.