How to clear iTunes of all unused iOS apps
With so many apps you can try and discard on your iPhone or iPad you can get a huge library of them in iTunes as iTunes doesn’t delete them and keeps updating them even, and it’s a pain in the rear to have to manually go through them all to see which ones you use and which ones you don’t.
- Get rid of all the iOS apps in iTunes;
- Clear out any extra apps you may have;
- Re-import the apps from your iOS device(s);
Go to the app section in iTunes, select all, delete.
Quit iTunes and check the Music/iTunes/iTunes Music/Mobile Applications folder for any remnants.
Start iTunes again and File>Devices>Transfer Purchases from (the name of your iOS device), repeat for any iOS device you have.
And of course make sure to make a backup beforehand in case anything does go wrong.