Meet the LifeTrak Zone R420: a handy watch that helps you continuously monitor your heart rate and analyze your heart zone on your smartphone. It lets you check your heart rate with a simple touch of a button. Users can review their heart rate zone in the LifeTrak app.
The Zone R420 is compatible with Apple Health and Google Fit. The watch is water resistant to 30 meters. The battery lasts for a year. You can find out more about it here.