IPATool
Command-line tool that allows searching and downloading app packages
ipatool is a command line tool that allows you to search for iOS apps on the App Store and download a copy of the app package, known as an ipa file. Supported operating system (Windows, Linux or macOS). Apple ID is set up to use the App Store. To authenticate with the App Store, use the auth command. To search for apps on the App Store, use the search command. To obtain a license for an app, use the purchase command. To download a copy of the ipa file, use the download command.