If your app requires certain hardware features to run properly on a user's device, you need to add a list of those requirements to the UIRequiredDeviceCapabilities key in your Info.plist file. However, you should only add keys for features you must have. Setting a key to false is not the same as leaving out the key. When you set a key to false, you are instructing your app to run only if the device does not have the requirements. Ensuring that you have properly set your UIRequiredDeviceCapabilities key is important so that users don't install your app on a device that lacks the necessary hardware.