There is no need for any extra wristband or hardware for you to be able to use the application;
It is a free pedometer app and once you download it you can start using it immediately;
It records steps, calories, and distance for a variety of exercises like walking, jogging and running hence giving you a wide range of options for your fitness activities;
It offers a wonderful trends analysis for your steps and weight to keep you both updated and motivated.
The application has the disadvantage of crashing every time users try to download an update for it.