Start a mobile conversation with a photo or a video and send it to your friends in the list. First they see and after a few seconds, they don't - the messages self destroys!
http://176.32.230.251/ratchatapp.com/
P.S. If you are facing an error pertaining to App Transport Security do look into https://forums.developer.apple.com/thread/3544 and do the edit mentioned in the thread in the Info.plist. This will disable ATS and let you test the app.