Check: Heart Rate (Pulse), Heart Rate Variability (HRV), Fitness and Stress level, Cardio calculations track progress and more using camera, ECG, or BLE device.

This app provides a tool for the measurement of the heart rate and its variability. It also provides a simple way to check the fitness level and the stress level of the user. It provides a summary of the results, as well as the ability to share them with other users.

This app is useful for people who want to get a better understanding of their heart health and the effects of their lifestyle.

The tool is based on the photoplethysmography (PPG) technique. This is a non-invasive method that allows you to measure the heart rate and its variability.