The iPhone app and Mac app are optional add-ons for your operators. Each operator will need to order the iPhone app and / or Mac app in the App store if they wish to use these apps on their devices.
For larger teams, Apple offers Volume Purchase Program (VPP) for businesses allowing you to order the iPhone app and / or Mac app in bulk. The Apple VPP is suitable if you have 10 or more operators as it allows you to manage all their app store licenses including Chatstack. You can read further details at https://www.apple.com/au/business/programs/.