Take pictures as quick as you can press the shutter! Its streamlined interface gives you a direct view on what the end result will look like, as you take pictures.
Then save to the camera roll, from where you can share it easily. Other quick buttons for restarting from scratch, or stepping back one picture to retake it.
The setting button gives access to settings for flash on/off or auto (default), the border thickness and color (default black), and whether to take pictures in spiral fashion (default) or panoramic mode (left to right).