If you are using Stripe as your payment processor, visitors to your checkout pages will have the option to pay with Apple Pay or Google Pay depending on the mobile device they are using at the time.

They will be presented with the option on the checkout page. Where they are prompted to enter their credit card number, there will also be a button to pay with Google Pay or Apple Pay, according to the customer's device type. If this button is selected, then an additional screen will appear to submit their payment information

Android device - Google Pay

iOS device - Apple Pay