Zone2Ai

Your Apple Watch is lying about your Zone 2. We fix that.

Zone2AI is the only Apple Watch app 100% focused on Zone 2 heart rate training. It calculates YOUR personal Zone 2 using real data. Not the generic "220 minus your age" formula from 1971.

How it works:
→ Karvonen method using your actual resting + max heart rate
→ Detects your true max HR from real HealthKit workout data
→ Classifies your fitness level from your VO2 max
→ Adjusts your zones after every workout based on RPE feedback
→ Adapts as you get fitter — your zones evolve with you

Real-time Zone 2 tracking on your Apple Watch. Weekly progress. AI coaching. No guesswork.

Download on the App Store: https://apps.apple.com/us/app/zone-2-ai-vo2-max-endurance/id6742467259
Website: https://www.zone2ai.com