https://www.theverge.com/2017/10/9/16446572/apple-itunes-12-6-3-app-support

If you’re one of the iTunes desktop users still frustrated that Apple suddenly got rid of the iOS App Store and ringtones, you might still be in luck. Some Reddit users have spotted that Apple has quietly released iTunes 12.6.3, which is basically the older version of iTunes for PC or Mac but with support for iOS 11, iPhone 8, iPhone 8 Plus, and iPhone X.

As reported by 9to5Mac, this version of iTunes is intended to be for enterprises that may still need the app function. iTunes 12.6.3 can be downloaded by anyone, but once it’s installed, users will no longer be prompted to update to future versions. Those who have already updated to iTunes 12.7 can still install 12.6.3, but it should be noted that Apple isn’t providing technical support for this version, only for 12.7.