App with not install free or purchased on iphone 5C

You haven't really given enough information for us to help here. 😕

Your device is limited to holding protected content from a maximum of five different Apple IDs. To transfer protected content from iTunes to your device the computer must be authorized for each account.

tt2

I suggest you describe the problem in more detail. The information your provide really doesn't help us help you. Tell us what happens when you try to install an app, what you have tried so far to correct the problem, what happened then, and what error messages you received.