The basic idea of the application is that you can formulate a wish and share it with people around you. The wish takes the form of a seed that you need to cultivate by giving enough water and light. Little by little the wish grows into a tree and it starts making flowers. People nearby can see your wish because it is planted at a geolocated position and can send you comments and encouraging messages to help you make you wish come true.
If you want to try out the app: WishTree