Disable Access To Old Versions Of App

I’m currently looking into using Appflow for a new iOS/Android app our development team are working on.
From a release management/configuration management perspective, what would be the best way to remove end user access to an old build? e.g. if we had a major bug in an old release

Maybe there are two aspects to this? 1. Updates made though Appflow hot code updates 2. Update required to the native app within the App Store/Play Store.

Apologies for what I am sure has a simple solution.