Protect your login With a second layer, it's no longer optional: attacks are constant, and credential leaks are commonplace. It's often cited that there's a cyberattack somewhere in the world every 39 seconds, which explains why adding two-factor authentication is vital for any important account.
The most comfortable and safe option for most is to use TOTP applications that generate temporary offline codes on your phone, better than SMS or calls. Still, not all apps offer the same features or security, and there are key differences in syncing, backups, privacy, compatibility, and token export.
What is two-step authentication and how does it work?
Multi-factor authentication adds an additional check over the password to prevent access even if it's leaked. With TOTP, a code is generated that expires every few seconds and is entered when logging in from a new or untrusted device.
The typical flow is simple: first you enter your credentials, the server validates them and then requests the second factorIn the case of TOTP, the server and your app share a secret key and, synchronized by time, generate the same code that you validate.
There are several types of 2FA, and not all are the same. Among the most common are email, SMS, voice callTOTP software tokens, biometrics, push notifications, and physical keys. For most services, TOTP offers an ideal balance between security and convenience.
Important note before migrating tokens
Never delete an account from authenticator directly without first disabling 2FA on the original website or service. Doing so could result in you being locked out. First, disable two-step verification in the service's security settings and only then delete the token from your app.
How to choose your TOTP app
As with any security tool, it is important to look at objective criteria: encryption and whether there are end-to-end encrypted backups, synchronization between devices and systems, biometric or PIN locking, token export and import, cross-platform support, and whether the project is open source.
Usability also matters: a clear interface, hide the codes on-screen, organization by folders or labels, search by name, and compatibility with Apple Watch or wearables. For professional environments, consider options with enterprise management and well-defined backup policies; these measures also help keep your social networks safe.
The best TOTP authentication apps and managers with built-in verification
1Password
This paid password manager integrates TOTP generation in login tabs, with versions for Android, iOS, Windows, macOS, GNU Linux, and extensions. It allows for password and code autofill on many sites, all with the security and auditing that characterize the brand.
If you're already looking to organize credentials and share securely, having passwords and codes Together in one vault is very convenient, although it requires a subscription. It's a solid solution for those looking for a multi-platform all-in-one.
2FAS Authenticator
2FAS is minimalist, free and encrypted End-to-end. It works offline, supports almost any TOTP service, and allows you to link tokens via QR code or manually, with Google Drive sync, backups, PIN or biometrics, and no ads. It also offers a browser extension.
Its greatest virtue is simplicity, although it lacks very advanced functionsIn return, the experience is clean, fast, and comprehensive enough for most users.
Aegis Authenticator
Aegis is exclusive to Android, free and open source, with vault encryption and biometric locking. It supports virtually all 2FA formats, backups, and organization. If you also use password managers, there are guides for Install KeePass on AndroidSome advanced features require root, which limits its appeal to the casual user.
It is a powerful option for those who prioritize privacy and control on Android, with export and import, and an active community reviewing the code.
andOTP
andOTP is Android and open source, very solid even though it no longer receives new functionsIt features encrypted backups, search, tags, and even a panic button to erase all tokens in emergencies.
Its design is simple and allows you to view secret keys or QR codes for each token, as well as export them to an encrypted file in the cloud. It's a favorite for advanced users even if it is frozen in functions.
Authenticator App for the Apple ecosystem
This app focused on iPhone, iPad, Mac and Apple Watch stands out for having browser extensions like Safari, Chrome, Brave, Vivaldi, or even Tor Browser. It's a paid browser with a limited free version, encryption, family sharing options, and Face ID locking.
For those who live in the Apple ecosystem and want deep integration, is an alternative worth considering, knowing that the best features require a license.
Authy by Twilio
Authy is one of the heavyweights, with apps for Android, iOS, Windows, macOS and GNU Linux, encrypted backups and multi-device synchronization between systems. It works offline, is easy to use, and offers broad compatibility with services and protocols.
It requires creating an account linked to a phone number, and on mobile it shows one token at a time, which is less convenient if you have hundreds. Even so, its cross-platform approach is hard to match.
Bitwarden
Bitwarden is a password manager open source and free for individual use. Its very affordable premium plan adds built-in TOTP that can autofill codes on the web and in apps, with clients for desktop and mobile, and extensions for almost all browsers.
Whoever wants one single vault For passwords and second keys you will find here an excellent solution for cost and security and you can learn how to view saved passwords on Android.
Mobile Duo
Owned by Cisco, Duo Mobile is very popular at the enterprise level and works with almost all standards. It offers Backup on Google Drive or iCloud without the need for your own account, clear interface, code hiding, and support for Apple Watch.
It does not allow token export, and iOS and Android copies are incompatible with each other. It also lacks access protection to the app itself, a point to consider.
FreeOTP
FreeOTP was born as an open alternative after the closure of Google's code. It is very minimalist, without cloud sync or file import, and on iOS it only accepts QR codes when creating tokens, while on Android it allows for a secret key and many settings.
Hides codes by default, on iOS it allows Touch ID or Face ID for tokens, but it doesn't have access lock And the interface is spartan. In return, it takes up very little space and performs without distractions.
Google Authenticator
The Google option is free, very simple and works offline. It allows bulk exports and imports via QR code, supports TOTP and HOTP, multiple accounts, and QR code configuration. It's also mentioned as a Chrome extension.
Historically, it didn't offer cloud backups, and QR codes sometimes failed. It recently added synchronization with Google account, but the copies do not use end-to-end encryption, so the backup model is not as private as other alternatives.
LastPass Authenticator
Standalone LastPass manager app with cloud backup and watch compatibilityIts main shadow is that the company suffered security incidents in 2022, which damaged its reputation.
If you decide to give it another chance, you will gain in features and ease, knowing that public perception remains marked by those events.
Microsoft Authenticator
In addition to being an authenticator, it acts as a password manager with auto-completion. IDs, addresses and paymentsIt's tightly integrated with Microsoft accounts and the Edge browser, includes biometric locking, and is free.
Your cloud copies are not compatible between iOS and Android, it consumes a lot of space and scanning QR codes may fail punctually. As a pure authenticator, there are options with better synchronization.
OTP Auth for iOS and macOS
OTP Auth is very complete in the Apple ecosystem, with copies in iCloud, Apple Watch and folder organization. Allows you to add by key or QR code, export everything to a file, and protect access with Touch ID or Face ID.
Some features remain for the paid version and does not hide codes on-screen. It's one of the most powerful options if you only use Apple devices.
Protectimus Smart OTP
Protectimus offers apps for Android and iOS, with support for multiple protocols and PIN protection. On Android, it's compatible with smartwatches, making it convenient to view codes from your wrist.
Its focus is on a solid TOTP app, with security layers extra and wide support.
Step two
iOS and macOS focused app with iCloud sync, user-friendly interface very minimalist and support for Apple Watch. The free version allows up to ten accounts, and a one-time payment unlocks more.
It does not hide codes, does not export or import tokens and lacks access protection, but its simplicity appeals to those who prioritize lightness.
TOTP Authenticator by BinaryBoost
With mobile apps and extensions for Chrome and Firefox, it stands out for its clean and intuitive interface. organization options that make it easy to manage multiple tokens. Great protocol support and easy use with almost any website.
The free account is somewhat limited and features like copies and extensions are left for the payment plan, a detail to keep in mind if you want synchronization.
WinAuth
Exclusive application for Windows, highly appreciated by gamers, as it supports non-standard tokens such as Steam and Battlenet, as well as common services such as social networks or email.
It hides codes, allows you to protect them with a password or YubiKey, encrypts data, and scans QR codes from local or network files. In return, it is recommended bypass authenticators on PC when possible due to higher risk areas.
YubiKey and hardware authentication
YubiKeys are the gold standard for physical 2FA, with IP68 rating, battery-free, and long-lasting durability. They support FIDO2, U2F, OTP and Smart Card Among others, they work with services such as Gmail or Facebook and there are models with FIPS certification.
When a service does not allow a physical key, you can use the app YubiKey Authenticator to manage OTPs. There are different formats for USB A, USB C, NFC, or Lightning, so they adapt to almost any modern device.
Proton Authenticator
Proton launched a privacy-focused authenticator that encrypts everything on the device and offers E2E copies and synchronization across Android, iOS, Windows, macOS, and Linux. It's open source, ad-free, and features biometric or passcode locking.
Allows import from other authenticators, supports TOTP and Steam authentication, choose algorithm between SHA1, SHA256 and SHA512, adjust the code length and time interval. To sync, you need a Proton account, with a free plan available for most users.
Ente Auth as an open alternative
Ente Auth is another project open source Highly regarded for its focus on privacy and simplicity. For those looking for open and auditable alternatives, it's an app worth considering alongside Aegis, 2FAS, or FreeOTP.
Built-in authenticator in iOS and Safari
Since iOS 15 and Safari 15, Apple includes a code generator within System passwords, with iCloud sync and autofill. On macOS, QR code scanning is done via screenshot with explicit user permission.
It's handy if you already use iCloud Keychain, but it displays one token at a time, doesn't hide codes, doesn't allow exporting, and can be difficult to find in settings. AutoFill it doesn't always work reliably everywhere.
Which one to choose according to your case?
If you want the best multi-device synchronization Without complications, Authy and Proton Authenticator are clear choices. Authy works on all systems with cloud backups; Proton adds the added benefit of end-to-end encryption and a highly focused approach to privacy.
For pure Apple ecosystem, OTP Auth and Step Two cover iPhone, Mac and Apple Watch well, and the integrated authenticator On iOS and Safari, it can be useful if you value autofill, with the limitations already mentioned.
If you are an Android user and you prioritize open sourceAegis is excellent for security and backups; andOTP is comprehensive, although it's no longer evolving; 2FAS offers simplicity, encryption, and browser extensions.
If you are looking for an all-in-one with OTP autocompleteBitwarden and 1Password allow you to keep your passwords and TOTP in the same vault, making logins across mobile and desktop faster.
Do you use Microsoft Authenticator and are you frustrated by the lack of smooth synchronization between mobile and tablet without making manual backups. Each new registration requires a restore, which is cumbersome. Instead, consider Authy or Proton for automatic syncing, OTP Auth with iCloud if you use Apple, or a manager like Bitwarden or 1Password to centralize.
Is it a good idea to use Google Authenticator?
Google Authenticator is simple, free, and doesn't require you to create a password. account in the app If you don't want to sync. If you enable sync with your Google account, you gain easy recovery, but backups aren't end-to-end encrypted, so someone who compromises your account could access that backup.
If you prefer maximum cloud privacyProton Authenticator offers E2E backups. If you don't want a cloud backup, you can continue using Google Authenticator locally and export via QR code when you change phones, knowing that this export is sensitive if the app is unlocked.
Good practices and backups
Don't limit yourself to just one app if your use cases advise it, you can combine a manager with TOTP for less critical accounts and a dedicated E2E authenticator for more sensitive ones. Prioritize device locking, in-app biometrics, and code hiding.
Make backups following the method for each app and save the recovery codes for critical services. In apps that allow easy export like OTP Auth, Google Authenticator or WinAuth, take extreme care with access control, because an attacker could clone your entire token collection if they unlock the app.
Useful resourceIf you manage an SMB, a cybersecurity checklist will help you avoid loose ends when it comes to identities, backups, and devices.
Two-step verification It's a lightweight, easy-to-configure lifesaver that multiplies the security of your accounts. After reviewing options for all systems, from ultra-minimalist solutions to complete suites with end-to-end sync and encryption, it makes sense to choose an app that balances convenience and privacy for your specific case, activate biometric locking, schedule backups, and, when possible, combine TOTP with physical keys to protect the most important access points.
