Android. The base functioning works well enough. I don't like the phone in my pocket. I don't like the sensors on the clubs. It's hard to remember to check the strokes after every hole. Getting better at adding/adjusting strokes but still not intuitive. Not able to hit practice shots/putts without screwing things up. Some people do great with it but it just takes me out of some of the enjoyment.I'm curious how so? Do you have an android or iphone?