App details
Latest (see Google Play)
October 14, 2026
Google LLC
IT Tools
Android
Free
com.google.android.apps.authenticator2
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About Google Authenticator
Google Authenticator creates short-lived codes that you type in after your password. This is called two-step verification, and it protects accounts even if your password is stolen.
How to use it
- In the account you want to protect, choose to set up an authenticator app.
- Scan the QR code shown on screen with the app.
- Enter the six-digit code to confirm. From then on, the app shows a new code every 30 seconds or so.
Avoid getting locked out
- Save the backup codes that the website gives you in a safe place.
- Before changing or resetting your phone, move your accounts across or make sure that your account sync is working.
- Never read a code out to anyone who calls you, even if they claim to be from a company.
More on securing your accounts in our Google account guide, and see Bitwarden for a password manager.
Our take
Authenticator codes are one of the best upgrades you can make to account safety, and the only real risk is being locked out when you change phones. Save the backup codes each service gives you, and transfer accounts before you wipe the old phone. Never read a code to anyone who calls you.
An everyday example
Before buying a new phone, a user opens each account, moves the authenticator codes across using the transfer option, and only then resets the old phone, so no account is locked.
Alternatives and related reading
Combine it with Bitwarden. Learn Google account security and set up Find My Device.
Common questions
What if I lose my phone?
Use the backup codes you saved, or the service's recovery process. Without them you may be locked out.
Is an SMS code the same?
SMS codes also help, but an authenticator app is generally harder to intercept.
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