No other external hardware is required, all you need is your smartphone. Camera is not used! Measuring is based on motion sensors. Your Recovery Heart Rate, the speed at which your heart rate returns to normal after exercise, can indicate physical cardiac condition and the risk of certain diseases.
Emil Doležal is the developer of this application that can be found in the Health & Fitness category. The developer rolled out a new version of Recovery Heart Rate on May 5, 2017 and over 1K users downloaded and set up the app. The tool has the average rating 3.5 on Google Play.
Advertisements are a part of this application. Download the installer of Recovery Heart Rate 4.1 that is available for free and read users' reviews on Droid Informer. The app is built for Android 4.0.3 and higher. The download of the app is safe and secure.