Believe it or not, the frame rate of a movie -- the speed at which individual frames are played back in front of our eyes -- has a big impact on the audience. Most professional films are shot at 24 frames per second (fps), but digital cameras often shoot at 30 or even 60 frames per second. Film buffs with a critical eye notice the difference, and some prefer the look of 24 frames per second. So how do you make a 24fps movie with the iPhone camera, which normally shoots at 30fps? Simple: Download an app.
FiLMiCPro is a $4 app packed with filmmaking features. iMovie is all about editing clips, while FiLMiC Pro is about shooting better video. It allows you to adjust frame rate to 24 fps, double the bitrate to 48 Mbps for even higher quality video, choose between three different focus/exposure systems and change the resolution to something lower than 1080p. While the iPhone can't measure up to the variety of options available on professional video cameras and DSLRs, FilMiC Pro gets you a step closer than the default camera app.
Some types of movies are shot at an even lower frame rate than 24fps. Time-lapse videos, for example, are often shot at 1 frame per second or even slower. There's a great app for that, too. The $3 Frameographer app is built for shooting stop-motion movies comprised of hundreds or thousands of still images captured with the iPhone camera. Frameographer also offers shooting and editing tools for making stop-motion animations. Creating an animation is a very different process from shooting a traditional movie, but with the right app in hand, the iPhone rises to either challenge.