Incredibly simple this one. Take a photo with your iPhone, press send and receive one back in return. Thats all it does and it becomes a little addicting to see what people are doing all over the world.

The only way of communicating of through the pictures. Its possible to reply to a message, and I've had 'conversations' of sharing pictures of pets, TV's or even writing notes and photographing them. There is the option to send your location with the image, so you can check out where an image was taken. You can also report anything inappropriate.

All in all a cool little app.