I didn't find any solution for my problem anywhere in Stack Overflow or other sites. So here is the problem:
I am developing an iOS Universal app, portrait orientation only. When I run it on iOS 8.3 simulator window and all other views layout seems to be normal.
But when I run the same app on iOS 7.1 simulator, which I downloaded from developer's site for Xcode 6, the window height seems to be approximately 100 px smaller.
I checked the couple of view frames for both simulators.
- 7.1 simulator was returning width = 320, height = 480
- 8.3 simulator returned width = 320, height = 568
I am using storyboard and constraints.
I am pretty sure that a lot of people had this problem, so I am hoping to hear some useful advices from you. Check out the screenshots below:

