# Duo Authenticator vs The Detectory

The clearest difference is ads: The Detectory at none against Duo Authenticator's shown. The Detectory also leads on update cadence (every 6 days vs monthly) and device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Duo Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days and The Detectory sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Duo Authenticator ships an update monthly, The Detectory every 6 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Duo Authenticator | The Detectory |
| --- | --- | --- |
| 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 | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 72 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Petr Polasek](https://appshunter.io/developer/1613323784) | [Orange Pixel Limited](https://appshunter.io/developer/1855817761) |

## 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 |


### The Detectory

[App page](https://appshunter.io/ios/app/the-detectory/id6755717176)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $7.99 | per month |
| Pro Subscription Yearly | $69.99 | per year |


## Frequently asked questions

### Is Duo Authenticator free?

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

### Is The Detectory free?

The Detectory is free to download, with in-app purchases available.

### Do Duo Authenticator or The Detectory have ads?

Duo Authenticator shows ads; The Detectory does not.

### Which is updated more often, Duo Authenticator or The Detectory?

Duo Authenticator ships an update monthly, and The Detectory every 6 days. Most recently, Duo Authenticator was updated on October 25, 2026 and The Detectory on October 28, 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.*