Zone 2 Buddy: Heart Rate Coach

Zone 2 training only works if you actually stay in Zone 2. Zone 2 Buddy taps your wrist the moment you drift — down-taps to ease off, up-taps to push — so your easy days build an aerobic base instead of turning into junk miles. Start a workout on your Apple Watch, put your phone in your pocket, and train by feel. No account. No sign-up. Your health data never leaves your devices. HOW IT WORKS • Set your zones in under a minute — percentage of max heart rate, or the Karvonen (heart rate reserve) method using your resting HR straight from Health • Pick your sport — 82 workout types, from outdoor and indoor cycling to running, rowing, hiking, swimming, strength training, and skiing • Train — distinct haptics for too-high and too-low, plus optional spoken alerts that duck your music instead of stopping it • Every session saves as a real Apple Health workout with heart rate, calories, distance, and GPS route. It closes your rings and shows up in Fitness. FREE • Real-time zone alerts on Apple Watch — haptic and spoken • All 82 workout types with GPS route recording • Workouts written to Apple Health • Five-zone setup with two formulas • Workout history with time in zone for every session ZONE 2 BUDDY PRO • LIVE DASHBOARD — mount your iPhone on the handlebars for big, glanceable heart rate, zone, speed, and distance streamed live from your watch • WEEKLY TRENDS — time-in-zone charts week over week, so you can watch your aerobic base build instead of guessing • WEEKLY RECAP — a plain-English read on your training week, generated entirely on your iPhone with Apple Intelligence. Nothing is uploaded. • CUSTOM ZONES — tune every zone boundary to your own physiology • LIVE ACTIVITY — heart rate and zone on your iPhone Lock Screen and in the Dynamic Island while a watch workout runs WHY ZONE 2 Most endurance adaptation comes from long, easy efforts. The hard part isn't the training — it's the discipline to keep the effort low when you feel good. Zone 2 Buddy is the thing on your wrist that keeps you honest. PRIVACY There is no Zone 2 Buddy account and no analytics server. Heart rate and workout data stay on your iPhone and Apple Watch. Requires an Apple Watch. Weekly Recap requires an Apple Intelligence-capable iPhone. Zone 2 Buddy Pro is available as a monthly or yearly subscription, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple Account. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/zone2buddy/privacy