It is a free mobile app that offers users the opportunity to walk and burn calories.

The application tracks users' steps and distance, as well as calories burned. The app also allows users to set a daily goal, track their progress, and view their history of walks and calories burned.

To participate in challenges, users need to register and sign in to their account. Challenges can be set for a specific period of time or until a certain number of steps are reached.

To save virtual trees, users need to download the free app and create their own map. They can then choose to participate in challenges or create their own.

The application is available in the following languages: English, German, Spanish, French, Japanese, Russian, and Portuguese.