Have you ever encouraged someone to do something but never found out if they actually did it or not? Proof! is a social-life app for friends and family to challenge one another by accomplishing life goals. People can select from a list of challenges already on the app or can simply create their own. Once someone has received a challenge, users must submit a photo or video to prove that they successfully completed their goal.

“Using photos and videos for visual evidence is such a great way to not only keep people accountable, which helps their success rate, but I also love that you can see other player’s uploads of visual proof for added motivation and creative ideas,” said Brett Blumenthal, author of A Whole New You.