Can I use MinMax Order Limits together with your other apps (e.g. together with Unlimited Upsell)?

Sure, you can use MinMax Order Limits together with our other apps.

In spite of the fact that, for instance, Unlimited Upsell requires to add also its code into the Script Manager section, it's not a problem.

You can create a script and save it for one of the app and then for the other.