Two-factor authentication, also known as 2FA, requires an additional login code to log into your account. These days, account hacks have become normal, so you need to be very careful by keeping your passwords strong and using two-factor authentication.

If the hacker tries to steal your password and username, it will still be hard to get your account, as it will ask for an authentication code that comes on your smartphone if you use Two-Factor Authenticator apps. When you use 2FA, any service you login to will ask you for two authentications; one is the password you know, and the other is the authentication code in the app.

Using Two-factor authenticator apps on smartphones has fewer options than using websites. Here are some of the Two-Factor Authenticator Apps for Android devices.

1. Authy


Authy two-factor authenticator app works similarly to Google and Microsoft’s variants. The codes are used to authenticate your login, and the codes are provided by the app. The app also supports offline device syncing, and it supports many sites and accounts. One of the best things is it’s totally free, without ads or in-app purchases.

Price: Free

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2. Google Authenticator

google Authenticator

It is one of the most popular two-factor authenticator apps by Google. For all Google accounts, the Google Authenticator app is recommended. Apart from Google accounts, it also works for many other websites.

It supports Wear OS, has a dark theme, and works offline. The app’s User Interface is very clean and easy to use, and it is supported by many devices. However, you will find it a little difficult to set up.

Price: Free

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3. Microsoft Authenticator


The Microsoft Authenticator app works very well, even for apps other than Microsoft apps. When you log in to any app or site, it will ask for a code, and this app gives you a code. If you use Google Services more, it is better to use Google Authenticator.

The same thing is true for Microsoft users also. If you use Microsoft more, then use this app, as it is free, there are no in-app purchases and no ads also.

Price: Free

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4. TOTP Authenticator

TOTP authenticator

TOTP Authenticator app is compatible with many devices and is a basic and powerful app. However, this app has a dark theme mode, fingerprint scanner, Widgets, and cross-platform support via Extension with iOS and Google Chrome. When you make any changes, you can view them on all of your devices via cloud syncing. This app is free but has in-app purchases.

Price: Free / $5.99

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5. 2FA Authenticator

2FA Authenticator

2FA Authenticator is a simple and free app for 2FA. It generates Time-based One-time Passwords (TOTP) and Push authentication. This app supports only the six-digit TOTP factor. It works very well with basic UI, and you can also add your secret key manually or use the QR code. This app does not contain many features, but it works great without any issues.

Price: Free

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6. andOTP


andOTP is a free and open-source two-factor authenticator app. You just need to scan the QR code and log in with the 6-digit code. This app supports the TOTP protocol. Most of them chose this app as it is not complicated to use.

It requires minimal permissions like Camera access for QR code scanning and Storage access for the import and export of the database. It has different theme modes like Light, Dark, and Black (for OLED screens).

Price: Free

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7. Aegis Authenticator

Aegis authenticator

One of the most popular 2FA apps is Aegis Authenticator. Aegis supports two algorithms, HOTP and TOTP. These algorithms are widely supported and make this app compatible with many services.

The web service which supports Google Authenticator will work with Aegis Authenticator. It has great features like you can lock the app and unlock it via PIN, password, or Fingerprint. Also, you can back up your account and export it to a new device.

Price: Free

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8. FreeOTP Authenticator

Free OTP

It is a free and open-source authenticator app that works with many online services you have already used, like Google, Facebook, GitHub, and more. FreeOTP also works with private corporate security if they complete the standardized TOTP or HOTP protocols.

It is a cheap solution for small businesses. Although it is not the most popular option for authenticator apps, it works really well.

Price: Free

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