Existe uma abordagem para consultar a biblioteca local do iTunes para remover aplicativos que não estão atualmente instalados em nenhum dos seus dispositivos?
Is there an approach to querying the local iTunes library to remove apps that aren't currently installed on any of your devices?
I might suggest a really wild -- possibly dangerous -- approach. If you have a good backup, it is less dangerous, but until you have restored from that backup there still can be snags and problems in a restore that you want find until that point. The good news is you don't need the backup, it's just there I case a crash happens in the middle of this process.
You should end up with only those apps that are installed on at least one iDevice! (In theory, at least.) And if anything fails, restore the library from its backup.
This worked for me without any issue: