How to Clear Cache on iPhone Published 2 months ago Slow iPhone? Running out of storage? Clearing the cache on your iPhone could help. There are a number of ways to improve your iPhone’s performance, but clearing its cached data is a quick and easy way to give it a jolt. You don’t need to clear your iPhone’s cache every single day, but it’s probably a good idea to do it every so often so that the data doesn’t bog down performance. If your iPhone is running poorly or you just want to quickly clean up its internal storage without deleting photos and videos, here’s how to clear the cache on iPhone.