Before we start, download Amazon Authenticator App by searching for it in your Apple device's App Store.

Log in to your Amazon account and select Account from the drop-down menu next to your profile picture in the upper right corner.

Find and click on Login & security.

Choose Edit beside Two-Step Verification (2SV) Settings.

Here you can get more info on how Two-Factor Authentication works and how to use it. When ready, click on Get Started.

Select Authenticator App as the preferred method of authentication

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

Open Authenticator App, tap the plus button, and hold your device up to the computer screen to scan the QR Code from Amazon web page.

After successfully scanning the QR Code, Authenticator App will automatically choose the Amazon 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

Once your Amazon account has been successfully added to the Authenticator App, enter the 6-digit code on the Amazon website and click Verify OTP and continue

You have successfully enabled two-factor authentication(2FA) to protect your Amazon account, from now on, you will need to enter a One Time Password(OTP) from the Authenticator App when you would like to log in to your Amazon account.