Two cameras,
one app.

A photo booth and a disposable camera, both in your pocket. Point, click, keep what you get. Everything stays on your iPhone.

Photo Booth

Hit start, mug for the 3-2-1, and four shots later you've got a paper strip with your caption on the bottom.

Disposable

Twelve exposures, a plain viewfinder and a satisfying click. Shoot the whole roll, then develop it and see what you caught.