Moov typically disconnects 8-10 times during my runs, so I typically have to tap it on my ankle every few minutes. Sometimes it disconnects and tells me it has to stop the current interval. Last run after 35 minutes, I hit end workout and it told me it didnt have enough data and ending the workout would delete the workout, I had to end the workout so all data from that workout was lost. Also, this app integrates with heart rate monitors but not the Apple Watch heart rate monitor.