Cardiogram - HR Monitor

Real-time heart rate & BPM tracking for Apple Watch and BLE monitors. Private offline HR zone & workout tracking with Apple Health sync. No account. No subscription.

Cardiogram is a private, real-time heart rate monitor, BPM tracker, and workout analysis app designed for iPhone, Apple Watch, and Apple Health users. Monitor, record, and analyze your heart rate during workouts, recovery, daily activity, or rest, with all data stored securely on your device. Unlike subscription fitness apps, Cardiogram works without accounts, cloud services, or data sharing, giving you complete control over your health information.

Real-Time Heart Rate & BPM Tracking Track your heart rate and BPM live using Apple Watch or compatible Bluetooth Low Energy (BLE) heart rate monitors. Whether you're training, running, cycling, or monitoring your daily fitness, Cardiogram delivers accurate real-time heart rate data when you need it most.

Apple Health Integration & Workout Analysis Import and analyze workouts stored in Apple Health, including sessions recorded with Apple Watch and other compatible fitness apps. Cardiogram automatically keeps your workout history up to date, making it easy to review heart rate trends, training intensity, and performance over time.

Recovery Heart Rate Understand how your body recovers after exercise with the 1-minute Recovery Heart Rate metric. Track your recovery across workouts and gain valuable insights into your cardiovascular fitness and training progress.

Heart Rate Zones for Smarter Training Visualize workout intensity instantly with color-coded heart rate zones: • Fitness • Fat Burn • Aerobic • Anaerobic • Maximum Effort See how much time you spend in each zone and optimize your workouts for endurance, fat burning, cardiovascular fitness, or peak performance.

Privacy-First by Design Your health data stays private. • No account required • No cloud storage • No tracking or data selling • Data stored locally on your iPhone and Apple Health Built for users who want accurate heart rate tracking and workout analysis without compromising their privacy.

Wide BLE Monitor Compatibility Connect external heart rate sensors including: • Polar • Garmin • Wahoo • CooSpo • Magene • Other Bluetooth heart rate monitors Ideal for runners, cyclists, gym enthusiasts, and anyone who trains with a Bluetooth heart rate monitor.

Fast & Battery Efficient Cardiogram is optimized for long workouts with minimal battery usage, providing reliable heart rate monitoring and workout analysis throughout every training session. Built for Training & Everyday Health

Use Cardiogram to: • Monitor your heart rate in real time • Track workout intensity and heart rate zones • Analyze workouts from Apple Health • Measure Recovery Heart Rate • Review heart rate history and trends • Record heart rate sessions • Improve training with actionable heart rate insights

Simple, accurate, private, and built to help you better understand your heart rate.

Disclaimer: Cardiogram is not a medical device and does not diagnose, treat, or prevent medical conditions. Always consult a healthcare professional regarding health concerns.