Below the categories in the left column is a "Requests" link listing all the various game requests and offers friends have sent you. Personally, I think this is the best part of App Center since it offers me a quick and easy way to block apps that annoy me such as two recent friend favorites Bubble Safari and Lucky Slots. To block an app just hover over the invite you want to block and click the "x" that appears. Facebook will then ask you if you want to block the app, block your friend's game invitations altogether, or ignore the invite.
Individual App Pages
Once you find an app you like, clicking on it sends you to a details page with information about the app. To the right, underneath the cover photo, you'll see action buttons to access the app. If the app is available exclusively for mobile devices such as Infinity Blade II you'll see a "Send to Mobile" button. If it's a Website like Hulu, you'll see a "Visit Website" button, and if it's Facebook app such as Social Empires or WSJ Social you'll see a "Play Game" or "Go to App" button.
Underneath the action button you can find important privacy information about the app such as what profile information it wants to access, whether the app can post to Facebook on your behalf, and your Timeline privacy settings.
The main part of the app details page is taken up by screenshots and other information about the app. Below that you will find important statistics such as how many users the app has, and which platforms the app is available on (iPhone, iPad, Android, Facebook.com, and Web).
Send To MobileApp Center also makes it a little bit easier to get mobile apps onto your iPhone, iPad, or Android device. Let's say you want to play Infinity Blade II on your iPad. Clicking the "Send to Mobile" button will send an alert to Facebook for iPad. Once you tap the alert, the iPad will switch to the App Store for iOS where you can download the game.
Facebook's App Center is a little bit clunkier than Google Play, which can automatically install an app on your phone by clicking one button through the desktop Web interface. But App Center's send to mobile feature can come in handy if you happen to find something on App Center that you'd like to use.
App Center is available now to U.S. users and will roll out to other countries in the coming weeks.