Burn: Fasting & BMI Tracker

Burn — Fasting Tracker, Weight & BMI Log

A simple tracker for intermittent fasting, weight, and BMI — all in one app. No subscription. No meal plans. No noise. Just honest data and a clearer picture of your body over time.

Most people fast without really knowing what their body is doing. Burn changes that. Set up your profile once — enter your age, height, and starting weight — and Burn does the rest. Every weigh-in is logged, your BMI stays current, and a chart shows your trend over time.

Track your fast, stage by stage
When you're fasting, Burn shows exactly where your body is in the process — and what's happening as you go deeper:
Fed state → Post-absorptive → Glycogen depletion → Fat burning → Ketosis → Autophagy → Deep autophagy

You'll know when you've cleared your last meal, when your glycogen stores run down, when your body shifts to burning stored fat, when you cross into ketosis — and when a longer fast tips you into autophagy, your body's deep cellular cleanup mode. All without guessing.

What's inside

Fasting stage tracker — follow your body through every phase of the fast
Weight log with full history and progress chart
Automatic lb/kg display — Burn detects your region and shows weight in the units you actually use, no setup required
BMI calculator that stays current with every weigh-in
Personal profile for your key health stats
Light and dark theme, so the app fits how you use your phone
Clean, distraction-free design
Why Burn?
✔ No subscription — ever
✔ No ads, no meal plans, no clutter
✔ Your data stays simple and readable
✔ Built for anyone doing 16:8, OMAD, extended fasts, or just tracking weight

Whether you're new to intermittent fasting or deep into extended fasts, Burn gives you a clear, honest view of your progress — and what your body is actually doing while you fast.

Download Burn and start your fasting journey today.