What's the use of ipad air time-lapse photography?

The delay mentioned by ipad air is not the exact delay. Usually what we mean by delay is to take a photo every few seconds, and then combine these photos into a video in the software.

Second, the delay function of ipad air is just a gimmick, which condenses the content of 30 minutes or even 30 hours into a few seconds of wonderful pictures. He just fast-forwards the video, which is not a real delay. Shooting takes up a lot of storage and is unnecessary. You can play if you want.