Is it possible to use Apple TV without an iPhone?

Certainly, one can use Apple TV without an iPhone. Apple TV is designed to operate independently as a streaming device that connects to a TV via HDMI. Users can control Apple TV with the Siri Remote that comes included with it, or they can use other compatible remotes. Setup and navigation can be handled directly on the Apple TV itself, and content can be accessed through various apps available on the Apple TV App Store. While an iPhone can enhance the experience by allowing for easy setup using an Apple ID, and by providing additional features like AirPlay, it is not a necessity for using the core functions of an Apple TV.