18 Best Authenticator Apps for Mobile

1. Google Authenticator

Download: Android iOS

Google Authenticator is my go-to app for two-factor authentication, and it's the best one out there! It's super simple to use and keeps my online accounts super secure. I used to use a bunch of different authenticator apps, but Google Authenticator has proven itself to be the most reliable and trustworthy. It's got over a billion downloads and a near perfect rating on the Play Store, so you know it's the real deal.

Key Features:

• Generates time-based one-time passwords for logins
• Uses QR codes for easy account setup
• Syncs codes across multiple devices

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2. Microsoft Authenticator

Download: Android iOS

Microsoft Authenticator is a mobile app that acts as a powerful security tool for online accounts. It utilizes multi-factor authentication (MFA) to add an extra layer of security, reducing the risk of unauthorized access. With over 133 million downloads, the app offers benefits such as passwordless logins, easy access to multiple accounts, and secure storage for your credentials. However, it's important to note that the app can be cumbersome for managing a large number of accounts and may require additional setup for each new account.

Key Features:

• Secure sign-ins for online accounts
• Generates time-based one-time passwords
• Approves notifications for added security

3. Duo Mobile

Download: Android iOS

Duo Mobile is a reliable app authenticator that provides two-factor authentication for various online services. While it generally performs well, it's not without its quirks. Some users have reported issues with push notifications, particularly with older Android versions, requiring manual approval. This can be frustrating, especially if you rely on quick and automatic authentication. However, Duo Mobile does offer a solution for this by suggesting disabling battery optimization for the app. Ultimately, Duo Mobile proves to be a valuable tool for enhancing your online security, but be prepared to troubleshoot minor issues, especially with older devices.

Key Features:

• Generates time-based one-time passcodes
• Receives push notifications for easy login
• Manages two-factor authentication for multiple accounts

4. 2FA Authenticator (2FAS)

Download: Android iOS

2FA Authenticator (2FAS) is a free, open-source app designed to enhance your online security by providing two-factor authentication (2FA). This app generates unique time-based codes that you use alongside your password for an extra layer of protection when logging into websites and applications. With over 4.1 million downloads, 2FAS boasts a user-friendly interface that simplifies the process of setting up and using 2FA. While its open-source nature promotes transparency and security, some users might prefer a more feature-rich app that includes additional functionalities like biometric authentication.

Key Features:

• Securely generates and manages authentication codes
• Supports multiple accounts and services
• Offers backup and recovery options for codes

5. Okta Verify

Download: Android iOS

Okta Verify is a mobile app authenticator that enhances security for your online accounts by implementing two-factor authentication (2FA). This app generates time-based one-time passwords (TOTP) or sends push notifications to your device, requiring an extra layer of verification beyond your password. Studies have shown that 2FA significantly reduces account compromises, with one study finding a 99.9% decrease in successful attacks against accounts with 2FA enabled. While Okta Verify is highly effective, it does require users to have their phone readily available for verification. However, for those seeking enhanced security, Okta Verify offers a convenient and reliable solution.

Key Features:

• Securely access apps with 2-step verification
• Generate and manage time-based one-time passwords
• Enable push notifications for convenient authentication