Apple’s iCloud Keychain – The Easiest Option for iPhone Users
If you’re a hardcore Apple user, then you’re probably better off using iCloud Keychain to manage your two-factor authentication codes.
Starting with iOS 15, you can now keep all your codes saved on your iPhone. Whether you use Discord, Gmail, Amazon, or any other app that requires you to input a code, iCloud Keychain has everything you need.
What’s great about iCloud Keychain is that it already does what Google Authenticator is trying to do: you can automatically sync all your authentication codes across all your Apple devices in a flash — and it uses Apple’s end-to-end encryption, so it’s very secure.