Building application package file for Android platform (.apk) is trivial, you can do it with simple command like ‘cordova build android’ or ‘ionic build android’. But building .ipa package file (for iOS platform) is not so trivial, so we’ll take a look how to do this.
An .ipa file is an iOS application archive file which stores an iOS app. Each .ipa file includes a binary for the ARM architecture and can only be installed on an iOS device. Files with the .ipa extension can be uncompressed by changing the extension to .zip and unzipping.