# Duo Mobile vs Authenticator App

The clearest difference is review sentiment: Duo Mobile at 68% against Authenticator App's 0%. Duo Mobile also leads on in-app purchases (none vs 4) and rating (4.9 vs 4.5). Authenticator App's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $4.99 per 7 days. Duo Mobile asks for nothing beyond the download.

Duo Mobile holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Duo Mobile has 2.3M ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 68% of Duo Mobile's written reviews are positive against 0% of Authenticator App's.

Duo Mobile ships an update fortnightly, Authenticator App monthly. The most recent releases landed on September 25, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | Duo Mobile | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (2.3M ratings)](https://appshunter.io/ios/app/duo-mobile/id422663827/reviews)** | [4.5 (24 ratings)](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300/reviews) |
| Number of ratings | **2.3M** | 24 |
| Positive reviews | **68.2% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#20** | — |
| Size | 46 MB | 101 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duo Security LLC](https://appshunter.io/developer/413163561) | [Apperture Limited](https://appshunter.io/developer/1727867515) |

## What reviewers say

### Duo Mobile

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

**Currently charting:** #20 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


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300)

Enhance digital security with a multi-factor authenticator app. It provides an extra layer of protection for sensitive accounts and information, working offline for reliable access. Protect email, social media, financial accounts, and more with this user-friendly solution.

**Highlights:** Multi-factor authentication, Offline 2FA code generation, Wide service integration, User-friendly interface, Enhanced account protection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $7.99 | per 7 days |
| Pro Version | $14.99 | per month |
| Pro Version | $39.99 | per year |


## Frequently asked questions

### Is Duo Mobile free?

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

### Is Authenticator App free?

Authenticator App is free to download, with in-app purchases available.

### Which has better reviews, Duo Mobile or Authenticator App?

Duo Mobile is rated higher. Duo Mobile averages 4.9 out of 5 from 2.3M ratings, while Authenticator App averages 4.5 from 24 ratings.

### Do Duo Mobile or Authenticator App have ads?

Neither Duo Mobile nor Authenticator App shows ads.

### Which is updated more often, Duo Mobile or Authenticator App?

Duo Mobile ships an update fortnightly, and Authenticator App monthly. Most recently, Duo Mobile was updated on September 25, 2026 and Authenticator App on August 18, 2026.

---

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