This app should have come with the Apple Watch
This app should have come with the Apple Watch. The Apple Watch reads your heart rate all day however there is no way to see that in matter is useful. This app give you a view of your heart all day. Even in your sleep. It also let you know where were the zones of your workout. This is the app missing to make the Apple Watch more useful. The only thing missing is a calories counting
Chuz_cr about
HeartWatch: Heart Rate Tracker