How to install third-party software on iPad?
1, open the settings, find the general and click Open.
2. Click on the description file.
3. You will see the untrusted app file in the description file and open the file that needs to be trusted.
4. Click Trust in the page of authorizing trust, and then click Trust in the pop-up window.
5. Finally, you can see that the app is set to trust and can be opened for use.