The iCloud feature on your iPad is not for storing apps.Apps are automatically stored in your purchased list in the app store.If you go to the app store and click the purchased tab at the bottom of the page,every app you've ever downloaded is there,whether or not it's still on your device.You can view the entire list or just the apps that are not on your device by selecting the option at the top of the page.You can re-download an app that is in the cloud by clicking on the cloud symbol,then the download tab.