If the APK file contains the Auto-installation feature, this process can take some time. After the process is completed successfully, you can open the downloaded APK file on IOS device. To open the APK file on IOS, you can simply open the downloaded APK file using iTunes. If the installation files contain the file Auto-installation feature, it opens to the App Store. In this case, you need to disable the auto-adoption feature. To do this, go to Apple's iTunes application on the home screen, then click on Settings. Then, go to General, go to Security, then turn off the setting to Turn on App Store Automatic Downloads.