There are plenty of threads about apps waiting to download or update and well it's actually easy to fix. This is how; first you need to hold the sleep/wake button and home button until the slide to power off screen spears at which you want to power off. You hold the same two buttons to turn your i-device back on at which point the app(s) should be fully loaded and you shouldn't have the problem anymore. (I had this problem on my iPhone 4 did what I just described and when my phone turned back on the app was loaded and I haven't had the problem since.) Hope this has helped.