We divided the whole planet in areas roughly the size of a football field, decided based on how long it takes one to walk and run in 1 minute. Each area is called a turf. We wanted users to compete for areas small enough to be captured quickly: on your lunch break, waiting for a friend, on your way to work.
Turf.ly tracks all your walks and runs in the background; it will start tracking once it detects that you are walking or running after you've been stationary for a while. Once you are stationary again, it will upload your path and assign points to each turf you crossed.
If you want to compete against others, you'll have to add friends. You can add friends using their screen name or just find nearby Turfers to play against (it shows you how much % overlap you have so you'll know how competitive another Turfer will be with your territory). You can also send friend invites via Facebook, Twitter or Email. If you don't want to compete – no problem, Turf.ly will give you points for activities on the turf map anyway.
When you first walk through a turf, you get one point in it and it's considered "explored" turf.
Blue turfs: If you have more pointsin a turf than any of your friends, you'll "capture" that turf, and it appears blue on the map.
Red turfs: If you and your friend have the same number of points, the turf is "rivaled" and appears red – these are the turfs you should target in order to capture more turfs.
Grey turfs:If your friend has more points in a turf, you'll lose that turf and it'll show up as grey on the map.
White turfs:You can see the points in all the turfs that your friends have explored, because they "scouted" the turf for you - invite a lot of friends to see a lot of scouted turfs!