Simple HRM

A demo Android application for wearable devices that reads and displays heart rate data.

The latest APK version can be downloaded from the Releases page.

How It Works

Simple HRM determines if the wearable is being worn using the TYPE_LOW_LATENCY_OFFBODY_DETECT sensor and then reads heart rate data (as beats per minute) using the TYPE_HEART_RATE sensor.

If the TYPE_LOW_LATENCY_OFFBODY_DETECT sensor sends an event that the device is off-body the UI will alert the user to place the device on their wrist. When the TYPE_LOW_LATENCY_OFFBODY_DETECT sensor sends an event that the device is on-body the UI will alert the user that their heart rate is being read. Then, once the TYPE_HEART_RATE sensor sends an event with a value for heart rate the UI will display the latest heart rate in beats per minute (BPM) and also display the 10 latest HR values in a line chart.

Design

• UI: https://dribbble.com/shots/14454424-Activity-Watch-App-Shot
• Chart: https://github.com/PhilJay/MPAndroidChart
• Loading animation: https://lottiefiles.com/8771-loading
• Font: https://fonts.google.com/specimen/Varela+Round