BurnCoach

Real-time heart rate coaching for the most efficient fat-burning intensity: Zone 2.
Your Apple Watch keeps you in the sweet spot — not too fast, not too slow — every second of your workout.
Diet results come from intensity, not just time.

■ Why BurnCoach is different

• Built for Zone 2 — Not just a heart rate display. BurnCoach tells you exactly how to adjust, every moment.
• Voice + haptic coaching — Don't even look at your wrist. Cues drop into your music like Apple Maps navigation.
• Auto phases — Warm-up, main, and cool-down transition automatically based on time and intensity.
• Live glow ring — The ring color changes the instant you cross zones, glanceable on your wrist.

■ Core features

• Real-time heart rate + zone detection (Rest, Warm-up, Fat Burn, Cardio, Peak, Max)
• Automatic Zone-time and Fat Burn duration tracking
• Post-workout report — zone distribution, average/max BPM, calories, GPS route (outdoor)
• Two-way HealthKit sync — pulls in workouts from other apps and writes back yours
• Live Activity / Dynamic Island — see your zone from the lock screen
• Pace coaching — voice cues to slow down or speed up
• Bluetooth heart rate monitors — pair a chest strap and train with iPhone only, no watch needed
• Start from iPhone — remotely launch the watch workout, or start right on iPhone with your HRM

■ Why Zone 2 matters

Zone 2 (60–70% of max heart rate) is where your body uses fat as the primary fuel.
• Faster (Zone 3+): you burn more carbs, less fat efficiency.
• Slower (Zone 1): not enough caloric demand to matter.

If your goal is weight loss, time-in-Zone-2 is the most honest metric.

■ With or without a watch

• Standalone Apple Watch — runs entirely on your watch; leave your iPhone at home. History syncs when reconnected.
• No watch? — pair a Bluetooth heart rate monitor (chest strap) and get the same real-time zone coaching on iPhone alone.
• Smart audio routing — coaching speaks through your earphones when connected, or your watch speaker when not.

■ Privacy first

All workout data stays on your device. No external servers. HealthKit access is fully controlled by you.

■ Requirements

• iPhone: iOS 17 or later
• Apple Watch: watchOS 10 or later (optional — Series 4 and newer recommended)
• Bluetooth heart rate monitor: standard heart rate profile devices (optional — for training without a watch)

Make every 30 minutes count.