As a part of the secure development environment that Apple provides to developers, you can define which devices are authorized to try the game/app during the development process. So, in case someone gets a development version of the game, he/she will not be able to run it on his/her device. Only the devices that are included in the provisioning profile (we will explain how to do this shortly) will be able to run the game build.

Adding a new device is a very simple process; you just hit the Add new device button in the Devices section on your left panel, and then provide the following details:

One last thing regarding the devices. Apple's developer portal allows you to add up to 100 devices in your devices list. These devices will not be per project but per account, meaning that you can have 100 devices as a company only; so, use them wisely if you are working in a huge team! Anyway, an iOS game in any size will not require such a massive team!