Ethan Welty and Caleb Phillips originally started Falling Fruit so they could keep track of edible plants in their city. The two are avid foragers, often sourcing their fruits and vegetables for free from city streets and public spaces. Foraging can help people save money and prevent food waste. And for Welty, one of the biggest benefits of Falling Fruit is that it can help people learn about the "different plants that have some sort of edible use" in their city. For instance, it's a useful tool in community education programs, like urban foraging trips, as well as in classes that teach people how to prepare the foraged fruits and vegetables they brought home. Since launching in 2013, Falling Fruit has mapped over 4,000 different species of edible mushrooms and plants " including fruit trees, berries and herbs " across almost 2 million publicly accessible foraging spots in cities around the world. Zooming in on Billings, Montana, the Falling Fruit map reveals edible plants clustered within the city's parks. These plants are part of the city's Parkland Gleaning Project to give excess harvest to neighbors facing hunger. The interactive map offers details for foraging, but more than that, people can use it to learn more about their neighborhoods. Community programs ... can have a bigger impact when paired with the Falling Fruit map. Falling Fruit is completely sustained by app sales, with annual expenses sitting at about $2,000. The app costs $1 to download.