Transform Your Training with Precision Heart Rate Zones!

Unlock your fitness potential with the most comprehensive heart rate calculator on the App Store. Whether you're a weekend warrior or elite athlete, discover your optimal training intensity for maximum results.

8 PROVEN FORMULAS
- Sally Edwards & Winfried Spanaus
- Classic Fox & Haskell formula
- Modern Tanaka & Gellish methods
- Latest Nes research (2013)
- Gender-specific Gulati & Miller formulas

COMPLETE TRAINING ZONES
Get personalized heart rate zones instantly:
- Warm-up Zone (50-60%) - Recovery & preparation
- Fat Burn Zone (60-70%) - Optimal fat burning
- Aerobic Zone (70-80%) - Endurance building
- Anaerobic Zone (80-90%) - Performance improvement
- VO₂ Max Zone (90-100%) - Peak athletic performance

KEY FEATURES

- Clean, modern interface following Apple design guidelines
- Instant calculations with detailed explanations
- Automatic data saving - your age and weight remembered
- Multiple language support
- No ads, no subscriptions, no data collection

PERFECT FOR

- Runners preparing for marathons
- Cyclists optimizing training rides
- Gym enthusiasts maximizing workouts
- Personal trainers guiding clients
- Anyone serious about fitness results

Stop guessing your training intensity. Start training smarter with science-backed heart rate zones that deliver real results!