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Polar Recorder
AppRecord raw Polar signals to files or your own server
Polar Recorder captures live sensor data over Bluetooth and saves it as JSONL files on your Android phone. It can also send readings through MQTT, a messaging protocol for your own server, and add timestamped event markers.
Which signals you get depends on the sensor. An H10 can supply ECG. Optical sensors can supply PPG and pulse intervals.
Recording needs a continuous Bluetooth connection. Watches need special SDK pairing. Sessions over six hours on Android 15 or newer need a source build, not the latest released APK.
- Keep readings off Polar’s cloud
- Record raw ECG locally
- Keep your own recording files
- Use readings in other apps
- Records several sensors in the same session
- Adds timestamped event labels
- Splits large recording files
- Includes Python and R analysis examples
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