# Protractor Tool app vs Impulse Noise Decibel Meter

The clearest difference is in-app purchases: Impulse Noise Decibel Meter at none against Protractor Tool app's 1. Impulse Noise Decibel Meter also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Protractor Tool app sells 1 in-app purchase, starting at $1.99 per 7 days. Impulse Noise Decibel Meter asks for nothing beyond the download.

## The numbers

| Metric | Protractor Tool app | Impulse Noise Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Size | 15 MB | 1 MB |
| Requires iOS | 18.4 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ES SOLUTIONS SMC-PRIVATE LIMITED](https://appshunter.io/developer/1770521364) | [Tigran Mkhitaryan](https://appshunter.io/developer/602761285) |

## What reviewers say

### Protractor Tool app

[App page](https://appshunter.io/ios/app/protractor-tool-app/id6752771015)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |


### 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 Protractor Tool app free?

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

### Is Impulse Noise Decibel Meter free?

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

### Do Protractor Tool app or Impulse Noise Decibel Meter have ads?

Protractor Tool app 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.*