# Duo Authenticator vs Aivi Client

The clearest difference is in-app purchases: Aivi Client at none against Duo Authenticator's 3. Aivi Client also leads on ads (none vs shown). Duo Authenticator's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Duo Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days. Aivi Client asks for nothing beyond the download.

Duo Authenticator ships an update monthly, Aivi Client every 2 months. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Duo Authenticator | Aivi Client |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (24 ratings)](https://appshunter.io/ios/app/duo-authenticator/id1665454984/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 152 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Petr Polasek](https://appshunter.io/developer/1613323784) | [Absolute Interpreting](https://appshunter.io/developer/1742765666) |

## What reviewers say

### Duo Authenticator

[App page](https://appshunter.io/ios/app/duo-authenticator/id1665454984)

Enhance your online security with this multi-factor authentication app. It provides an extra layer of protection for your accounts by generating time-sensitive codes, even when offline. Secure your sensitive information with ease and peace of mind.

**Highlights:** Quick and easy setup, Wide service compatibility, Time-sensitive security codes, Offline code generation, End-to-end encryption, Security code protection

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Week | $3.99 | per 7 days |
| Premium 1 Month | $9.99 | per month |
| Premium 1 Year | $29.99 | per year |


### Aivi Client

[App page](https://appshunter.io/ios/app/aivi-client/id6504420021)

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

**In-app purchases:** none


## Frequently asked questions

### Is Duo Authenticator free?

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

### Is Aivi Client free?

Aivi Client is free to download, with no in-app purchases.

### Do Duo Authenticator or Aivi Client have ads?

Duo Authenticator shows ads; Aivi Client does not.

### Which is updated more often, Duo Authenticator or Aivi Client?

Duo Authenticator ships an update monthly, and Aivi Client every 2 months. Most recently, Duo Authenticator was updated on October 9, 2026 and Aivi Client on October 1, 2026.

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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.*