The app itself is great. 5 stars on the iPhone. I give it only 1 star however because I think the Apple Watch implementation is a great idea, however when you move your wrist down to play guitar for example, the watch screen shuts off, and the haptics stop, and as a guitar player in a band, it is better to have a quiet haptic metronome when warming up than to have to take out headphones in order to hear the metronome. The app addresses this issue by saying to go into your watch settings and go to wake screen, but there is no option to keep the watch screen from turning off, only an option to keep it from turning on when your raise your watch. This may be a development limitation, and maybe Apple needs to make a way to keep the watch screen from going dark when using a certain app, but nonetheless the app advertises that it can give you haptic feedback to give you your tempo, and it delivers, however for many instrument players, this feature is useless because many of them lower their wrist to play, thus shutting the screen off and rendering this feature useless. Hopefully there is a workaround eventually, I really like the idea of the app, but it needs to fix this critical issue before it is given a full 5 stats from me.
Developer replied on Mar 24, 2018
I’m sorry you’re frustrated that the Pulse Watch app stops when the screen turns blank. We’re upset about it, too! Unfortunately, the app will turn off when you move your wrist because Apple's WatchOS requires all non-native apps to turn the screen off and stop running in the background when you move your wrist. We’re hoping we can get around this in a future version of WatchOS. Thank you for all of your helpful feedback! - Seth