MNN Galleries

7 apps to help you get the most out of nature

By: Shea Gunther on March 16, 2011, 11:10 a.m.
iPhone screen of Green Boot app


2 of 9

Green Boot

The Green Boot app is a wonderfully simple app — it keeps track of how many steps you take, serves up ads while you have it running, and then donates a portion of that ad revenue to a nonprofit organization or project that promotes land conservation.

With Green Boot, you can choose from more than 90 parks, land trusts, foundations that will benefit from your steps. The app is free, which makes it an easy click to install and try it out.