Apple Watch is designed to work hand-in-hand with iPhone. You use the Watch app on your iPhone to set up Apple Watch, then customize your wearable by downloading apps, switching watch faces, and choosing from the best Apple Watch complications.
Does the Apple Watch work without an iPhone?
However, there is a lot you can do with your Apple Watch even when you don’t have your iPhone with you. Check it out!
To use your Apple Watch without having to carry your iPhone, you'll need a watch model with the GPS + Cellular connectivity option. Then you can take calls, receive text messages, and stream music on your watch without using your iPhone.
But an Apple Watch can also do a lot without being connected to your iPhone, even without a cellular connection:
