iOS app 'The application could not be verified' only on one device

Question

I had something similar happen to me just recently. I updated my iPhone to 8.1.3, and started getting the 'application could not be verified' error message from Xcode on an app that installed just fine on the same iOS device from the same Mac just a few days ago.

I deleted the app from the device, restarted Xcode, and the app subsequently installed on the device just fine without any error message. Not sure if deleting the app was the fix, or the problem was due to "the phase of the moon".

As I notice The application could not be verified. raise up because in your device there is already an app installed with the same bundle identifier.

I got this issue because in my device there is my app that download from App store. and i test its update Version from Xcode. And i used same identifier that is live app and my development testing app. So i just remove app-store Live app from my device and this error going to be fix.

just delete the app and try again, it happens to me when i try to launch over a device that has the same app but generated by an ipa file.

You probably used the "Fix Issue" option in Xcode when plugging in a new device. Old question but I believe this is the actual answer to WHY this is happening. When you install an app on a device it is signed with a specific development provisioning profile. If, for instance, you plug in another device that is not registered on your developer account Xcode will ask you to "fix the issue". When you press that the device is added and another provisioning profile is created/modified. If you try to overwrite an existing app you'll receive that error. Deleting the app and reinstalling it works since the profile has been altered. I find this often happens when a Team is set and a member plugs in a new device then Xcode "Fixes" the problem.