Cardiogram - HR Monitor

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.