There are several reasons why someone might search for a manual IPA installation rather than using the standard App Store:
A voice on the other end—not robotic, but eerily calm—spoke. "Build 4.2.1 was never meant to leave the dev server. Who gave you the link?" imo ipa download
Here’s a brief review of searching for — aimed at users considering this option for iOS. There are several reasons why someone might search
Unlike the App Store version, a tampered IPA may bypass privacy settings. Account Bans: Unlike the App Store version, a tampered IPA
If you have a jailbroken device, you can use Cydia or another package manager to download and install IMO IPA:
This means the enterprise certificate used to sign the app has been revoked by Apple. You must delete the app, find a newly signed IPA, and reinstall. This is a cat-and-mouse game that happens weekly.