Now there is one more solution: Apple provides the iTunes version (12.6.3), which supports new devices such as iPhone 8 and iPhone X, which still retain the App Store.
Apple Configurator 2 works well for me, but I am adding this answer to those who would rather use iTunes or use Apple Configurator (Windows users) Source: https://9to5mac.com/2017/10/09/apple-itunes-apps- focused-removed-stopgap /
Download: https://support.apple.com/en-us/HT208079
Edit: You can have iTunes 12.7 and iTunes 12.6.3 installed side by side.
Install iTunes 12.6.3 from the links above. Copy the iTunes app and paste it wherever you want, rename it if necessary. Hold the option and double-click iTunes. Create a new library in a separate location. iTunes 12.6.3 and iTunes 12.7 cannot use the same library because iTunes 12.7 will update the file and iTunes 12.6.3 will not be able to understand it. Download the latest version of iTunes from the Apple website and run the installer to update the base copy of iTunes. (Optional) Change the iTunes 12.6.3 icon to another icon to separate them. (Right-click Get Info, drag a new icon onto an existing icon). Important: you will need Option-Open each time you switch versions so that you can select the desired library and not upgrade the old library to 12.7 format.
form: iphone - How to download an iOS application (IPA) file on a Mac after updating iTunes 12.7? - ask different
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