With the Sweatcoin app you get points whenever you walk outside. It uses your location which lets them know if you're outside or inside. You also get 5 sweatcoins for every person you invite.
I got recently redeemed Sweatcoins for two Ardene gifts cards which got me 2 hoodies, a water bottle and a headband. They have pretty good rewards, the only thing that would make this app better would be receiving points for walking in the building.