Aside from calories burned, pace, and route traveled, some apps may measure additional metrics. Users are then rewarded with points or cash for reaching certain milestones, such aslot appss completing a certain number of steps or covering a specific distance. Depending on the app, these points may be exchanged for gift cards, PayPal cash, or other payment methods. Some walk & earn money apps allow users to track their physical activity in addition to earning rewards for completing surveys, referring friends, and taking part in challenges.