It’s long way but I’ll try to guide you with headlines
First, you’ll need a certificate to install apps on your iPhone.
You can get the certificate through the iOSGods App+ website, which provides an app that allows you to install IPA files, and you can also install their own apps from the same store.
Or you can search online for other stores that offer the same method — it’s up to you and which one you’re comfortable with.
Installation is easy:
Whether through IOSGODS App or other stores after downloading the IPA file from safari Open the Files app on your iPhone, go to Downloads, find the IPA file you downloaded from the website, copy it from Downloads, and paste it into the iOSGods folder.
Then open the iOSGods app and you’ll find the app listed there.
Notes:
I don’t recommend using free certificates because they get revoked quickly. It’s better to find a trusted store and buy a certificate from them — this part is up to you.