Before you can set up Two-Factor Authentication for your Nvidia (GeForce NOW) account you'll need to download Nvidia Authenticator App on your device by searching for it in your Apple device's App Store or click on the button below Download on the App Store.

Sign in to your Nvidia (GeForce NOW) account, click on your account icon at the top right of the screen.

Under the Security section click on Update button.

Locate Authenticator App Code and click on it.

Click the toggle switch to turn on Authenticator App Code

In this step is shown the QR Code that contains the secret key which you need to scan with Authenticator App. Keep the page open as you reach for your device.
Note: Do not scan the DEMO QR Code shown below.

Open Authenticator App, tap the plus button, and hold your device up to the computer screen to scan the QR Code from Nvidia (GeForce NOW) web page.

After successfully scanning the QR Code given by Nvidia (GeForce NOW) on step 8, Authenticator App will automatically choose the Nvidia logo and autofill the account name and secret key. Click on Save when ready.
Tip: You can choose the account icon by pressing on icon

Returning to the Nvidia (GeForce NOW) web page, type in the six digit code from Authenticator App in the appropriate field. When done click OK.

You have successfully enabled two-factor authentication (2FA) to protect your Nvidia (GeForce NOW) account, from now on, you will need to use the Authenticator App when you would like to log in to your Nvidia (GeForce NOW) account.