# RSA Authenticator (SecurID) vs Duo Mobile

The clearest difference is rating: Duo Mobile at 4.9 against RSA Authenticator (SecurID)'s 2.7. Duo Mobile also leads on review sentiment (57% vs 27%) and update cadence (fortnightly vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Duo Mobile holds the better App Store score, 4.9 against 2.7. That said, the two scores are not equally well evidenced: Duo Mobile has 2.3M ratings behind it against 335, so its average is the more settled of the two. Written reviews point the same way: 27% of RSA Authenticator (SecurID)'s written reviews are positive against 57% of Duo Mobile's.

RSA Authenticator (SecurID) ships an update every 3 months, Duo Mobile fortnightly. Both last shipped on October 29, 2026.

## The numbers

| Metric | RSA Authenticator (SecurID) | Duo Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (335 ratings)](https://appshunter.io/ios/app/rsa-authenticator-securid/id318038618/reviews) | **[4.9 (2.3M ratings)](https://appshunter.io/ios/app/duo-mobile/id422663827/reviews)** |
| Number of ratings | 335 | **2.3M** |
| Positive reviews | 26.8% of reviews | **57.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Best chart rank | #173 | **#16** |
| Size | 64 MB | 49 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Mac | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [RSA Security](https://appshunter.io/developer/318038621) | [Duo Security LLC](https://appshunter.io/developer/413163561) |

## What reviewers say

### RSA Authenticator (SecurID)

[App page](https://appshunter.io/ios/app/rsa-authenticator-securid/id318038618)

**Currently charting:** #173 Top Free · Business (US App Store)

This app provides multi-factor authentication for enterprises, offering passwordless security through device-bound passkeys. It supports various authentication methods like OTP, biometrics, and push notifications to secure digital access.

**Highlights:** Multi-Factor Authentication (MFA), Passwordless Security with Passkeys, One-Time Passcodes (OTP), Push Notifications, Biometric Authentication, QR Code Authentication

**In-app purchases:** none

**What reviewers like**

- 🚀 Works great
- 🔒 Secure authentication
- 👍 Easy to use
- 🚀 Convenient alternative to hardware token

**What reviewers complain about**

- 🐛 Face ID bug
- 🐛 Persistent token disappearing issue
- 🐛 Buggy app
- 🤔 Confusing UI changes
- 🤔 Ugly app icon

**Reported bugs**

- App crashes on launch
- Token import/sync issues
- Incompatibility with newer iOS versions
- Incorrect token generation on wrong PIN entry

**Requested features**

- Add Apple Watch support
- Implement Face ID/Touch ID authentication
- Allow copying/pasting of token
- Provide option to customize notification sounds
- Add widget for quick token access


### Duo Mobile

[App page](https://appshunter.io/ios/app/duo-mobile/id422663827)

**Currently charting:** #16 Top Free · Business (US App Store)

Enhance login security with two-factor authentication. Generate passcodes or use one-tap push notifications for seamless access to your accounts. Manage authentication for multiple applications and web services.

**Highlights:** Two-factor authentication, Passcode generation, Push notification authentication, One-tap login, Manage multiple accounts

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🔒 Provides an extra layer of security
- 🚀 Quick and convenient authentication
- 🔒 Secure login experience
- 👍 Straightforward and user-friendly

**What reviewers complain about**

- 🐛 Unreliable notifications and push functionality
- 🐛 Compatibility issues when changing devices
- 🐛 Slow and frustrating authentication process
- 🐛 Confusing and non-intuitive user interface
- 🐛 Forced use of the app causing inconvenience

**Reported bugs**

- Notifications not working as expected
- App not recognizing new devices after replacement
- Authentication process getting stuck or timing out
- Inability to recover accounts after device changes
- Unexpected language changes in the app

**Requested features**

- Allow more control and customization for users
- Improve integration with other authentication methods
- Provide better support and guidance for new users
- Add an option to remember trusted devices
- Streamline the authentication flow for faster access


## Frequently asked questions

### Is RSA Authenticator (SecurID) free?

RSA Authenticator (SecurID) is free to download, with no in-app purchases.

### Is Duo Mobile free?

Duo Mobile is free to download, with no in-app purchases.

### Which has better reviews, RSA Authenticator (SecurID) or Duo Mobile?

Duo Mobile is rated higher. RSA Authenticator (SecurID) averages 2.7 out of 5 from 335 ratings, while Duo Mobile averages 4.9 from 2.3M ratings.

### Do RSA Authenticator (SecurID) or Duo Mobile have ads?

Neither RSA Authenticator (SecurID) nor Duo Mobile shows ads.

### Which is updated more often, RSA Authenticator (SecurID) or Duo Mobile?

RSA Authenticator (SecurID) ships an update every 3 months, and Duo Mobile fortnightly. Most recently, RSA Authenticator (SecurID) was updated on October 29, 2026 and Duo Mobile on October 29, 2026.

### Which is more popular, RSA Authenticator (SecurID) or Duo Mobile?

RSA Authenticator (SecurID) currently peaks at #173 in the App Store charts, and Duo Mobile at #16. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*