The "Peek" app came about from the idea that rather than waiting for your friends to send you pictures you could actively "pull" pictures as you wanted them. Going further we thought that while selfies are fun, it would be cool to also see your friend AND their surroundings.
Upon receiving a peek request users have 10min to accept or decline, gaining or loosing them points and/or features. After accepting a Peek challenge, the app opens the front and rear facing cameras and takes a picture and sends it automatically.