Game motion is jittering in iPhone

HI Its been 3-4 month since i start working in unity and almost finish my two games. But what i’m experiencing is that when i build my game in ios and play its kind of shuttering the game. Shuttering may be if not the right word but it is like when i play it on android phone the motion is clear and smooth but in iPhone motion is kind of create pain in the eyes. feels like everything is shaking. And i’m experience this in every iPhone like 5s , iPhone 6 && iPhone6 +.
I’ve Google it a lot and seems like a lot of developer facing the same problem but not a fixed solution yet.
If there is any solution please let me know.

I don’t know what to do as I don’t know that much unity yet.

OK finally I’ve found something very simple. By default the frame rate in the Ios device is very low like 25-30 .
So we’ve to manually set the frame rate in the script like in the awake or in the start method write this.
Application.targetFrameRate=60;
this work for me you can adjust the frame rate at your will.
I hope this will help someone like me :p.