Needed
Haptic Feedback Too Weak
Please make it stronger.
I use this watch HIIT app several times a week
I really like how the results of the workout feed into the activities app. In order for this to happen, you have to agree for access to Apple health. Make sure you decide to do this the first time, otherwise you will have to delete the app and reinstall it again to activate this.
There are several different configurations of HIIT that I do, and it is very easy to adjust those using the watch interface. It comes with a Phone app as part of it, but I have never used it. I always use the watch.
I would definitely recommend this app if you are doing high intensity interval training.