Nomo Cam is a super fun point and shoot camera app for the iPhone.
I've used many vintage camera apps over the years and this is by far my favorite one because of its simplicity.
Nomo Cam includes a range of vintage cameras to experiment with such as the "Toy F" camera, which is modeled after the Fujicolor disposable camera.
There is an element of unpredictability to taking photos on this app which makes it feel authentic and exciting.
I never know exactly how the photo will turn out, especially when I play around with the double exposure feature.
The free version of this app includes plenty of fun cameras to play around with, but you can purchase more cameras if you'd like.