I have used ShotScope the last few years. I don't play as much as I used to, but I like it because it gives me data I can use beyond distances to front, middle, center, hazards, etc.
You can use it to track your yardages. It comes with screw caps you can put into grip of your clubs and they register your swing and tag the start and end of a shot that way. They are unique, so it knows when you had a 6i vs a PW. It can get a little wonky for a chip that doesn't involve a lot of arm/hand motion, but at worst it's a good quick judge of yardage to your target if you didn't want to know your club carries.