Because Dlinstagram-IPA is not on the App Store, you cannot install it like a normal app. Below are the three most common methods used by iOS enthusiasts.
When to seek alternatives
"It’s not an app," a user named NullSet had messaged him. "It’s a skeleton key. You don't view the feed; you own it. You can pull data that the servers try to hide. But be warned: the IPA bypasses the App Store for a reason. It operates outside the rules." dlinstagram-ipa