An app which you could mark a place where you believe it coould recieve a tree, bush, etc.
You could mark on the map the exact place (with zoom) and the app could see the orientation, solar incidation in each part of the year, and considering the city, estate and country. It sugest the species that could be cool for this place. It's importante that you could mention in the app it there is any eletric cable, etc, close to the place.
You could plant the tree or also leave a mark for another person to plant as your orientation.
A catalogue of plants could be available for specific regions in order to maintain the native species.