A free app for Android, by Polar Electro.

Polar GoFit is a free app for teachers and school administrators that allows them to track the performance of their students in real-time, view and measure their heart rates, and assess their exercise intensity.

The app provides teachers with the data they need to provide individual assistance to their students and to measure the effectiveness of the class as a whole. It allows them to track their students’ progress in real-time and get a snapshot of the students’ overall performance.

The app also allows them to track and view the progress of their students in the classroom, on the playground, or at home. It provides them with the data they need to measure the performance of the class and the effectiveness of the lesson.