One of the many new features of iOS 5 and iCloud is that you can download previously purchased apps from the App Store without having to sync with your Mac or PC. While the feature really does come in handy, there are times where you may actually want to hide some of them (like you guys who read Cosmopolitan).
For iPhone
First, go to the App Store and tap the Updates tab at the bottom. Next you'll want to look for the purchased tab, just swipe left to right and a red "hide" button will appear. Tap that and you are done, the purchase is hidden.
For iPad
Now for iPad things are essentially the same with just one less step. As you know, iPad users have a purchased tab right at the bottom (no need to enter the updates tab). Just like on the iPhone, once you're in the purchased tab just swipe left to right on the app you want to hide then click the red hide button.
So there you have it, two incredibly easy ways to hide those purchased apps you may not want everyone to see.
(Source: iClarified)