The Skydroid app can tell you a distance to any point and it offers the ability for you yourself to go in and add points to bunkers,water hazards or safe landing areas.
For the cost it is great and depending on your phones gps strength you can have distance of 1-3 yards off or as much as 10 yds off.
I've used it for 2 years and recommend it, but before buying it or any cell app, check if you have good cell coverage in the places you play.
If you don't then you'll just waste your money and should get a laser range finder imo