Can a cellular or even a Wifi (or GPS only) Apple Watch be used without a iPhone or iPad?

[max2]

I am not sure that is why I am asking! Thanks.

 

[elvisimprsntr]

AW only pairs with iPhone that I am aware of, which you need to set it up and perform firmware upgrades.

I often forget my iPhone in the car, but I can a still make Apple Pay payments with a GPS only AW.

 

[wHD]

You need an iPhone to initialize it. Then you can use the watch without the phone. The watch will have access to most of the applications, messages and emails included. Few ones such as Phone calls (non cellular), Camera … won’t run Since they require the phone
Be aware the watch will keep only 7 days of health data history (step, heartbeat …)
If it can’t connect and synchronize to its phone during these 7 days, the oldest health data will be definitively lost

 

[Thirio2]

I have forgotten my phone a few times, and it seems the battery drains fast since it must spend all its time looking for my phone. If it happens again I will try putting my watch in airplane mode to save battery.