IPhone is messed up after downgrading from iOS 7 beta?

So I have a iPhone 4S and I downloaded the iOS 7 beta then I didn't like it do I downgraded to 6.1.3 and now my phone battery is dieing and it signed me out of all the accounts on apps like Instagram an vine but the one main thing that is bad on the phone after downgrading some apps are screwed up such as Instagram whenever I open it it just freezez on the main screen an never loads then crashes then with another app I have is keek and it just stays at the main screen and no matter it where you touch on the screen it just stays motionless and the batterer just drains too fast so end of story what is causing this and how can I fix it

The problem is that when you put on iOS 7, all the apps updated to give you version that were made for IOS 7.0. I would just keep 7.0 on. In the future you will have to have 7.0 on or no other apps will work. Apple designed 7.0 to make all aps develop out of 6.1.3. Thus helping jailbreak sites fail.

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