# Spyden vs Duo Viewer

The clearest difference is iOS requirement: Spyden at 17.0 against Duo Viewer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Spyden sells 3 in-app purchases, starting at $7.99 per 7 days and Duo Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Spyden | Duo Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 59 MB | 2 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [FAST BROWSER](https://appshunter.io/developer/1585955948) | [Liangjun Song](https://appshunter.io/developer/6816411623) |

## What reviewers say

### Spyden

[App page](https://appshunter.io/ios/app/spyden-spy-camera-detector/id6764502574)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Subscription | $7.99 | per 7 days |
| Monthly Premium Access | $14.99 | per month |
| Yearly Premium Access | $39.99 | per year |


### Duo Viewer

[App page](https://appshunter.io/ios/app/duo-viewer/id6816411621)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duo Viewer Pro | $6.99 | one-time |


## Frequently asked questions

### Is Spyden free?

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

### Is Duo Viewer free?

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

### Do Spyden or Duo Viewer have ads?

Neither Spyden nor Duo Viewer shows ads.

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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.*