The app is free this month to celebrate Earth Day! See and act upon your ecology! Leave ecology notes to people who will be in the area. Get a listing of eco-postings ordered by distance from you and read any ecology issues. Pinpoint sustainable solar panels, windmills, or water conservation practices on home, ranch, or business. Ecology students can post observations of trees, rivers, insects, animals, plants, snow, rain, and rock formations. Free till December 17th, afterwards $0.99.