Since most Android OS smart watch have Google Pay installed, it is common for Android OS smart watch to be able to use Google Pay.If you don't have your smartwatch, go to Google Play to download and install it.For your smartphone, install the app to your smartphone. Make sure your smartwatch and smartphone are logged into the same Google account so that you can use your smartphone to operate the corresponding functions of your smartwatch.

The installation steps are as follows:

1.Download the app from the Google Play Store to install it.

2.Open the Google Pay app and tap the Start button.

3.Next, click the Connect to “Gmail” button. A window will pop up asking you to allow Google Pay to access your device's location.

4.Google Pay wants to know your location to let you know when you can accept or use your loyalty card. To use the location feature, click the blue letter On button at the bottom of the screen

5.There are four tabs at the bottom of the Google Pay app: Home, Payments, Pass, and Send. Go to the Payments tab and click the Add Payment Method button.

You can also start from the Home tab. Go to the "Pay with your phone in stores" section and tap the blue "Settings" button. If you already have a card in your Google Account, it will provide the appropriate app to connect that credit or debit card to your phone.