Install app which was removed from App Store

geohei wrote:

Hi.

I have an app on my iPhone X (iOS 15.4.1) which connects to a Home

Automation system. Its manufacturer unfortunately stopped production 3

years ago. The app, as well as the Home Automation system, work

perfectly well. Subject manufacturer now also decided a few months ago

to take the app out of the Apple App Store.

Now, I would like to install the app on a friend's iPhone so that he can control my Home Automation system as well.

Is there any (?!) mean to get this app to his iPhone?

Many Thanks,

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