What is the primary function of the Messages app on Apple devices?

The primary function of the Messages app on Apple devices is to send and receive messages. This app allows users to communicate via text messages, including SMS and MMS, as well as through iMessages when communicating with other Apple users. The Messages app supports not only standard text but also multimedia messages, which can include photos, videos, and voice messages, creating a versatile communication platform.

While managing device settings, making video calls, or controlling network settings are important functionalities of Apple devices, they do not fall under the primary purpose of the Messages app. The app is specifically designed for messaging, making it an essential tool for communication among users.