Download and install the software now. Currently, there is only a Windows version. Open the software, drag the IPA file into the box on the left side of the software, enter the apple id on the right side, and then click Start. When the software displays 100%Done, the installation is completed, and the app icon will appear on the mobile phone. Just open the phone-Settings-General-Profile-and click on the installed IPA to select Trust.

Precautions:

Some networks can't be verified by side-mounted official website, so they need scientific access to the Internet. APPleID needs to log in to AppStore and iCloud. ITunes can't be the version of Microsoft Store, and the signature is only valid for seven days. An AppleID can only sign up for three apps. It is better to register a few new Apple IDs to sign more applications.