# Duo Authenticator vs Clinch!

The clearest difference is price: Duo Authenticator at Free against Clinch!'s $14.99. Clinch!'s advantage is ads (none vs shown) and update cadence (every 9 days vs monthly). On in-app purchases, device support and iOS requirement there is nothing between them.

Duo Authenticator is free to download; Clinch! costs $14.99 up front. Duo Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days and Clinch! sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Duo Authenticator ships an update monthly, Clinch! every 9 days. The most recent releases landed on October 9, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Duo Authenticator | Clinch! |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| 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 | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 14 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Petr Polasek](https://appshunter.io/developer/1613323784) | [Defiance Strategy Ltd](https://appshunter.io/developer/1800740166) |

## 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 |


### Clinch!

[App page](https://appshunter.io/ios/app/clinch/id6759801298)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 AI Tokens | $4.99 | one-time |
| 2000 AI Tokens | $19.99 | one-time |


## Frequently asked questions

### Is Duo Authenticator free?

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

### Is Clinch! free?

Clinch! costs $14.99, and also offers in-app purchases.

### Do Duo Authenticator or Clinch! have ads?

Duo Authenticator shows ads; Clinch! does not.

### Which is updated more often, Duo Authenticator or Clinch!?

Duo Authenticator ships an update monthly, and Clinch! every 9 days. Most recently, Duo Authenticator was updated on October 9, 2026 and Clinch! on September 28, 2026.

---

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