# Vision Viewer vs Impulse Noise Decibel Meter

The clearest difference is ads: Impulse Noise Decibel Meter at none against Vision Viewer's shown. Vision Viewer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Vision Viewer | Impulse Noise Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Size | 61 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [YOON HO YOUNG](https://appshunter.io/developer/1864792745) | [Tigran Mkhitaryan](https://appshunter.io/developer/602761285) |

## What reviewers say

### Vision Viewer

[App page](https://appshunter.io/ios/app/vision-viewer/id6757133739)

**Features:** macOS Compatibility

**In-app purchases:** none


### Impulse Noise Decibel Meter

[App page](https://appshunter.io/ios/app/impulse-noise-decibel-meter/id6780625581)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vision Viewer free?

Vision Viewer is free to download, with no in-app purchases.

### Is Impulse Noise Decibel Meter free?

Impulse Noise Decibel Meter is free to download, with no in-app purchases.

### Do Vision Viewer or Impulse Noise Decibel Meter have ads?

Vision Viewer shows ads; Impulse Noise Decibel Meter does not.

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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.*