Should I build with iOS 7 SDK or iOS 8 SDK?

When I try to build for iOS, there is an option “iOS SDK”:

Option 1:  7.1

Option 2:  8.0

Should I choose 7.1 or 8.0?

I just built an iOS app with option 7.1 and submitted it to App Store and now it’s waiting for review. But I am wondering if I should choose 8.0? 

Apple is still accepting iOS 7.1 apps so that is what I would submit. If you build for iOS 8.0, you may need some news permission calls which we are still sorting out in our Daily Builds.

Thanks for the helpful answer.

Apple is still accepting iOS 7.1 apps so that is what I would submit. If you build for iOS 8.0, you may need some news permission calls which we are still sorting out in our Daily Builds.

Thanks for the helpful answer.