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When you tap on an app that is in the 'waiting to download' stage, the i Pad will try to download it.
If tapping on the app didn't solve the problem, you can check to see if there is anything in line ahead of the app.
You may need to sign into the app again once it is downloaded. If going through the authentication process by downloading an app doesn't work, sometimes simply logging out and logging back in will do the trick.
You can sign out of your Apple ID by opening the i Pad's settings, choosing i Tunes & App Stores in the left-side menu and tapping where it displays your Apple ID.
This is actually fairly common and there are a number of reasons why an app might get stuck in the downloading phase.
It's possible for the i Pad to get hung in the middle of the authentication process.After checking the most common reasons for an app not to update or download completely, it is time to go with the most popular troubleshooting step: reboot the device.Remember, it is not enough to simply suspend the device and wake it up again.If nothing else has worked but you are worried about the documents you've created in the app, you can connect your i Pad to your PC and check i Tunes on your PC to see if the documents are available for copying to your home computer.
(Find out how to copy files to your PC.) If the app doesn't save information or if the information is saved to the cloud as with apps like Evernote, simply delete the app and redownload it from the App Store.If that didn't happen, it would have been almost 22 months since a toolbar Page Rank update.