This app has a built-in sensor to count your steps. No GPS tracking, which will save your battery life. It also will track your burned calories, walking distance and time, etc. All this information will be clearly displayed in graphs. To get started tap the start button then your read to go. Whether your phone is in your hand, backpack, pocket, it can auto-record your steps even your screen is locked. but we recommend to leave the app open for best tracking. Cost Everything in the app is 100% but we do display ads in the app. Privacy Everything in this app is completely safe you don't even have to sign into the app to get started. Graphs The report graphs is one of the best designs ever. They are designed to help you keep up to date with your tracking data.You can check back 24 or weekly or even monthly.