Can promo code users update a 'custom app for business' I've made a small app for the company I work at and I'm looking to distribute it. It isn't going to very many people, less than 100. I don't want to use it as a B2B app as then I'd need to setup a server and setup device management. It seems I'm able to distribute promo codes and users can install the app through the app store that way, even though the app is a  'custom app for business'. 

Is this a reliable method of distribution?

Will users be able to update?
Is this a reliable method of distribution?


No. It won't work at all -- an application that is not useful for the general public will not be approved for distribution through the App Store.

You will need to distribute this app through the Enterprise program.