The number of scam apps on the App Store has been on the increase, and Apple hasn't really been doing much to protect their customers from them. That is until now, with new rules going into force over night.
One of the ways scammers got around Apple's vetting process was to submit an app with the correct screenshots, name and description, then change everything wholesale once the app had passed review. Thankfully that's now a thing of the past.
In a short statement on their developer blog, Apple had the following to say: "Beginning January 9, app screenshots will be locked in iTunes Connect once your app has been approved. New screenshots may be uploaded when you submit a binary for an update to an existing app or a new app."
That means screenshots can't be swapped out for different ones after Apple has given the app the once over, and that the scammers are going to have to find a new way to rip us off. If you're still wary about an app though, you should check out PocketGamer's guide to spotting a scam, which walks you through the best way to make sure you're not being taken for a mug.