I have been using arccos now for the past two seasons. I have found it extremely insightful in diagnosing what I am doing well and what parts of my game I should be focusing on improving. The app is very well laid out and has most everything you could want, from pre shot analytics to post round diagnosis and everything in between.
Since Arccos, ive been using its information to give myself more meaningful practice seasons focused to the facets of my week areas, I have seen my handicap hit single digits, and my confidence countinuly grows.
Two thumbs up.