Question: is the iphone se compatible with the apple watch series 4?
Answer: "Apple Watch Series 4 (GPS) requires an iPhone 5s or later with iOS 12 or later." ... Apple Watch Series 4 (GPS) requires an iPhone 5s or later with iOS 12 or later. Since the iPhone SE was released after the iPhone 6s Plus, the iPhone SE will also be compatible with the Apple Watch Series 4 (GPS).