intermittent fasting tracker
Watch the flame grow with every hour you fast.
Burn is a clean, private intermittent fasting tracker. Start a fast and a live flame ring fills toward your 16-hour goal, showing your projected end time and the metabolic phase you're burning through - from fat burning to ketosis to autophagy. Keep your streak alive, watch your weekly hours add up, and chart your weight and BMI over time. Everything stays on your device.
Built for anyone doing intermittent fasting - 16:8 and beyond. Track your fasting window, your streak, and your weight, all in one lightweight app that works offline.
Intermittent fasting tracker features
Live fasting ring
Every hour, right in front of you
Start a fast and a flame-colored ring fills in real time toward your 16-hour goal. Fast past the goal and a hotter overflow lap keeps burning - so you always know exactly where you stand.
Metabolic phases
Know what your body is doing
As the hours pass, Burn labels the phase you're in: fed state, post-absorptive, glycogen depletion, fat burning, ketosis, autophagy, and deep autophagy.
Projected end time
See when your fast completes
The moment you start, Burn shows the clock time your 16-hour window closes - today, tomorrow, or later - so you can plan your first meal.
Streaks & totals
Momentum you can see
Burn counts your consecutive fasting days and tallies your total fasting hours for the week, so consistency becomes its own reward.
Weight & BMI
Chart the trend, not the noise
Log weigh-ins and Burn plots a clean trend line of your recent entries, along with your current weight and BMI from your height.
Private by design
Your data stays with you
No account, no cloud, no server. Everything is stored locally on your device and works offline. Reset it all with one confirmed tap whenever you want.
Screenshots
FAQ
How much does Burn cost?
Burn is a one-time $1.00 purchase on Google Play. No subscriptions and no ads.
What fasting schedule does Burn use?
Burn tracks toward a 16-hour fasting goal by default - a 16:8 style window. Start a fast and the live ring fills as the hours pass, shows a projected end time, and keeps sweeping into an overflow lap if you fast longer than the goal.
What are the metabolic phases?
As your fast runs, Burn labels the metabolic phase you're in: fed state, post-absorptive, glycogen depletion, fat burning, ketosis, autophagy, and deep autophagy.
Can I track my weight?
Yes. Log weigh-ins and Burn plots a weight trend chart of your recent entries, plus your current weight and BMI calculated from your height and latest weigh-in.
Does Burn use the cloud?
No. Burn keeps all of your data stored locally on your device. There's no account and no server, and it works offline - it's your data, on your phone.