Files in ~/Library/Application Support/MobileSync/Backup/ are named by UDID.
there's a bunch of UDID apps (free) that you can download from the App Store.
Don't iOS apps have the permission to use the internet without any hassle? In that case, I would assume by using such app, chances are, you are contributing to another entity's UDID collection.
If in doubt, download and turn flight mode on before running, then uninstall?