Heart Monitor 24

Andreas Burner

In-app purchases

About this app

Visualize and log your heart's electrical wave forms for 24 hours straight. Heart Monitor 24 connects to your Polar H10 chest sensor and captures high-resolution heart data, giving you the long-form waveform insights that standard fitness trackers cannot provide.

— WHY HEART MONITOR 24? —

Standard fitness apps often provide only simple heart rate numbers. Heart Monitor 24 records the raw electrical signal continuously for hours — during sleep, training, and daily life — giving you a complete picture of your rhythm patterns and data-driven insights into your physical recovery.


— HIGH-FIDELITY DATA LOGGING —

Heart Monitor 24 uses the Polar H10's 130 Hz sampling rate to capture raw electrical signals at the highest consumer-grade quality available. Because the sensor sits directly on your chest, the signal stays clean and stable even during movement or sleep.

• 130 Hz raw data — high-fidelity capture for personal research
• Continuous logging for 24 hours or more (Pro)
• Stable chest-sensor signal — reliable during exercise and overnight


— ADVANCED SIGNAL VISUALIZATION —

Unlock the hidden structure of your rhythm patterns. Heart Monitor 24 runs advanced signal processing on the raw data to detect and visualize waveform components with millisecond precision.

• Detailed waveform detection — identify patterns in every pulse
• Automatic R-R interval analysis — log and visualize rhythm variability
• Baseline optimization and signal cleanup algorithms
• Instantly see pattern changes and early pulse timing


— PERFORMANCE & RECOVERY ANALYSIS —

Your heart patterns tell a story of recovery and stress. Heart Monitor 24 captures it all — a full night of resting heart rate variability and how your rhythm changes from deep rest to peak activity.

• Record overnight heart data for recovery analysis
• Correlate patterns with training intensity and daily stress
• Spot rhythm changes that occur during different activity levels


— YOUR DATA, YOUR CONTROL —

Heart Monitor 24 is built on a strict Local-First privacy model. Your data never leaves your device.

• No cloud — all recordings stored exclusively on your iPhone or iPad
• No account required — no login, no subscription tracking
• Export as CSV — open in Excel, MATLAB, or Python for your own research
• Capture and visualize heart data patterns the moment they happen


— KEY FEATURES —

• Unlimited recording duration (Pro version)
• Real-time waveform visualization as data streams in
• Browse and manage all past data logs
• Interactive viewer with zoom and navigation
• Component toggle — show or hide individual waveform labels
• Overview chart for quick navigation across long recordings
• Import and export data in standard formats
• Optimized for iPhone and iPad


— FREE vs PRO —

Free: Full access to all features — recordings capped at 60 seconds.
Pro: Remove the time cap for long-form data logging and analysis.


— REQUIREMENTS —

Requires a Polar H10 heart rate chest sensor (sold separately).


— NON-MEDICAL DISCLAIMER —

Heart Monitor 24 is intended for fitness, research, and informational purposes only. It is not a certified medical device and is not intended to diagnose, treat, or prevent any medical condition. This app does not provide medical advice, diagnosis, or clinical monitoring. Always consult a qualified healthcare professional for medical concerns.