Reviewed in You Need to try this!
Paper karma is a great app for the environment as well as you. Basically the just of this app is to get rid of some of the junk mail you receive at your house. What you do is take a picture of the offer or letter and they find out the sender and stop them from sending you mail. It's that simple. Saves you from having them waste paper on what you are going to throw away. Definitely recommend this app.