Zone2 — Heart Rate Zones

Zone2 is a heart-rate tracker built for Zone 2 cardio. Paired with Apple Watch, it detects your heart-rate zone in real time and helps you stay in Zone 2 — the most effective zone for burning fat and building endurance. Features: • Real-time zone detection — always know which zone you are in • Apple Watch workouts with continuous background tracking • Apple Health integration — workouts saved automatically • Track your Zone 2 minutes for every session Whether you want to boost aerobic endurance, manage body fat, or build a steady training habit, Zone2 helps you train smarter.