FatBurn Watch

FatBurn Watch helps you stay in your fat-burn heart-rate zone during cardio workouts at the gym.

Set your profile and target zone on iPhone, then start a workout on Apple Watch. When your heart rate stays above the upper limit, the Watch alerts you with haptics, sound, and an on-screen warning so you can ease back without staring at the screen.

Pro — one-time purchase
Explore daily, weekly, and monthly charts of time and percentage in your target heart-rate zone. Set weekly goals, track consecutive goal weeks, and show synced progress on widgets and your Apple Watch face. No monthly or yearly fees.

Heart-rate alerts, workout tracking, and saving to Apple Health remain free. Workout history is a Pro feature for new users, with a sample preview before purchase. People who first downloaded the app before this change receive all Pro features, including the new analysis, at no extra charge.

Key features
- Start and stop workouts on Apple Watch
- See real-time heart rate during a session
- Estimate HRmax from age (Fox or Tanaka formula)
- Personalize your zone with resting heart rate (Karvonen method) and measured HRmax from Health
- Tune target zone (% of HRmax or Direct bpm) and alert sensitivity
- Mute alerts for short breaks
- Save workouts to HealthKit

Privacy
Heart-rate and workout data stay on device and in HealthKit. FatBurn Watch does not send this data to external servers, track you, show ads, or use third-party analytics.

Important
FatBurn Watch is not a medical device. It is a heart-rate feedback tool for workouts and is not intended to diagnose, treat, or prevent any medical condition. Consult a physician if you have health concerns.