When trying to update an app, it partially downloads and then displays the message "unable to download item" Please try again later. This happens on any app I try. I have tried deleting the app and reinstalling with same results. What can I do?

I have exactly the same issue. Its very frusrtating

Happening with me too. Even I've downloaded a paid app. Money's not back yet.

Are you downloading to device via wifi or to computer?

Is iTunes up to date?

I have the same thing happening on my iPod Touch 5th gen. Been happening for at least a month. I have updated to the most recent version of iOS which hasn't solved the issue. Must be a bug that they didn't get around to resolving yet, a year later. Really annoying to have it pop up when you are in the middle of a game though.