iPhone Game Controller
The Razer Kishi is a controller you attach to your phone, making it look similar to a Nintendo Switch. Through a direct connection to the Lightning port it offers low latency input so your gameplay doesn’t lag. The controller is adjustable so it fits most iPhones and the Apple Store app will tell you if it’s compatible with your iPhone or not.
It’s available to purchase for US$99.95 and would make a great gift for the iPhone gamer in your life.