Due to unknown reasons, apps you had previously purchased can no longer be downloaded from the App Store or iTunes. However, it turns out these applications can still be accessed. Originally, this tutorial was written to use iMazing's app downloading feature. This is because iMazing downloads apps using a different endpoint from what iTunes uses. However, I have also decided to write the tutorial to use ipatool-py, because it also uses the different endpoint when entering the Apple ID and Password into the command line.
This app must have been purchased on your Apple ID beforehand. You cannot download any app ever made. Apple only lets you download apps you had bought or downloaded in the past.
I reccomend using the ipatool-py method, because it is easier. However, if you are unable to use it, I have left the original iMazing method for you to follow.
- App ID (Number such as 1053533457) of app to download