This article explains how to record a time-lapse video on an iPhone. You'll also find instructions for using the time-lapse mode in the Camera app and converting a regular iPhone video into a time-lapse video using iMovie.
How to Make TIMELAPSES on iPhone
The camera app does all the work, but you have to set it up properly. Here’s how to make a time-lapse video with an iPhone:
Swipe right on the camera options to select TIME-LAPSE.
Place the iPhone on a tripod.
