Thanks to iCloud you can now access every single app you have downloaded, whether free or paid-for, with ease and without the need to pay for it again.STEP 1
Open the App Store application and tap the Purchased link in the bottom menu bar.
You can now access all your app downloads since you set up your Apple ID.
From this screen, tap the "Not On This iPad" link at the top of the page to access iCloud and the downloads contained within.
Having selected the app you wish to download simply click the iCloud icon beside the app and it will instantly start to install.