How to disable animations on iPhone?
Solution 1:
The only way I'm aware of to do this is to use a jailbreak tweak called Springtomize. Apple will not allow you to do this natively since it affects the aesthetic quality of the device. That's just Apple!
Solution 2:
Since iOS7 there are a couple of options for reducing animations and other UI effects such as translucency:
Settings > General < Accessibility > Increase Contrast: On/Off
and
Settings > General < Accessibility > Reduce Motion: On/Off
Solution 3:
I also had the same problem on my iPhone 5s.
When I checked my Reduce Motion setting, it was disabled. Which means there must be motion.
So I powered off my iPhone and powered on it again. After that everything was back to normal.