To use an IPA today, you would need to "sideload" it using tools like Sideloadly or AltStore.
Here is the number one mistake users make. You download any random WWE_Immortals_v1.2.ipa from a forum, sideload it via Cydia Impactor or AltStore, and then open the app. The result? A black screen, or a message: "This game requires an internet connection to verify assets." Wwe Immortals Ipa
Free Apple Developer accounts require you to refresh the app every 7 days. AltStore automates this when your computer is on the same Wi-Fi. To use an IPA today, you would need
This is the most stable method. It requires a computer to "refresh" the app every 7 days (for free accounts). Install AltStore on your Mac or PC. Connect your iPhone and install AltStore onto it. The result
: You would need to look on third-party archival sites like the Internet Archive or community-run "abandonware" forums.