What is “other” on iphone? I cleared all the app cache by filling up the iphone, and I calculated the size of all the apps that I have PLUS THE STOCK apps and is about 2.9 gb. I have no music and the photos have the “optimize” thing and have a size of 70mb. The “system” tab takes about 6 gigs. I wonder if Apple is trying to hide the fact that ios 11 takes much more space, by the way, I don t use siri.