App Store update problems on iPhone 6

[bbueding]

Lately when I have multiple apps to update the update all in the upper right is grayed out and I have to tap each app individually to update. In addition the notification icon may show I have updates when I actually don't have any. I've tried re-booting my phone but it still shows I have updates when I actually don't. Anyone else experiencing this problem?
IPhone 6 iOS 8.1.2

 

[zzdjk6]

I had similar problems before, but not exactly like yours.

It may caused by "not enough free space" when you update or synchronize your apps.