I’ve been using iOS 7 on my iPhone 4 for a few days now, and it’s not as bad as I thought it would be. It can get laggy, especially when opening and switching applications, but that’s to be expected. Unfortunately this lag hits a lot while I’m typing. A common problem is the keystrokes being processed lag behind my actual strokes by a fair bit. This happened in iOS 6 too, but the problem now is that it processes me hitting Send or Done before it processes the rest of my keystrokes.
This causes me to accidentally send texts cut in the middle. On iOS 6 this was never a problem so I’m not sure why this behavior changed between versions. Minor inconvenience that I have to adjust for I guess.
The camera is greatly improved. Since it’s still the same hardware, this means the changes must have been made on the software end. That just makes the changes even more impressive. The camera initiates faster, focusing is faster and seems to do a better job, but most importantly of all the camera takes photos much faster.
I don’t know if this is because they got rid of the shutter animation, but I’m sure that helps make it seem faster. I was having a rough time on iOS 6 with my camera taking forever to open, focus, and take the picture. But now it’s worlds better.
Overall verdict for iOS 7 on an iPhone 4? Bearable. But I think at this point it’s a matter of how long before I break down and get a 5S. The lack of translucency in the UI and missing out on features like Siri, turn-by-turn voice navigation and more are just one nail after the other in my iPhone 4’s coffin. God, I wish I had AirDrop and AirPlay.
At least the iOS 7 lock screen makes my background look awesome.