2025-09-19 00:00:00 Surf Advisor is a free and great alternative to expensive GPS watches. Track your surf sessions on the water with your phone in a watertight case. Upload your track to the Monthly Scoreboard and compete against other surfers on speed and distance. If you already have a GPS watch, export your track from your watch in the GPX format and import it in the app. From the Monthly Scoreboard, check out other surfers uploaded tracks and replay them. It is always fun to see where your friends went and how they managed.