Snap Chat has been updated to fit iPhone 6 screen. Not sure about the 6+ since I don't have that model. Just downloaded the update in the app store, and it wasn't all distorted, but made no mention in update of fixing app to fit iPhone 6 screen.
Is it the 7.1 update? I downloaded it earlier but all it said was something about the video chat having a lock now so you don't have to hold your finger. Screen still looks blurry to me