This past summer software programmer Patrick McConlogue made Leo Grand a deal - the homeless man could have $100, or he could get lessons in writing software code. Grand took McConlogue up on his offer to tutor, and has just released his first app on the App Store, according to Hubspot.

Grand worked at MetLife until 2011 but lost his job and his apartment after he was unable to pay rent. The last four months haven't been easy for Grand - he was arrested for trespassing in October and lost the Chromebook McConlogue purchased for him to learn coding on, but a Google exec replaced it. Thousands of Facebook followers have donated supplies and encouragement, as well.

Now the app's available. It's called Trees for Cars, and it lets people carpool and share rides. It also estimates how much carbon dioxide you're saving by buddying up with other people to drive. Grand gets to keep the proceeds, after Apple's 30 percent cut. There's also a Trees for Cars web site where you can get more info about Grand's app, or buy a limited "tree shirt" or hoodie to help the cause. Watch the video above to get more info about the app directly from the developer.

Source: Hubspot