Users gift trees to their friends. For every gift sent to a friend, the Arbor Day Foundation plants a tree in one of eleven forests. The cost of sending a tree to a friend is $1. The Arbor Day Foundation has a goal of planting one million trees in the first year of the application. Toyota is supporting the effort by purchasing $50,000 worth of trees, so the first 50,000 users can send one tree to a friend for free.