Had a round of golf today with Golfshot app on my watch. It uses the phone's gps to give a distance to the green, this info is abailable on the watch. It gave very accurate yardage (from phone location - not watch). Very low battery use, played 18 holes and iPhone 6 still on 96% charge - phone used about 5% in the 4hrs. Only gripe was the inability of the app to easily change holes, not automatically realising that you'd moved on. Overall, accurate with low battery use on phone and watch, no need to buy a dedicated golf gps device now!