# NIOSH Sound Level Meter vs Cuspart

The clearest difference is in-app purchases: NIOSH Sound Level Meter at none against Cuspart's 7. NIOSH Sound Level Meter also leads on ads (none vs shown). Cuspart's advantage is update cadence (every 2 months vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Cuspart sells 7 one-off in-app purchases. NIOSH Sound Level Meter asks for nothing beyond the download.

NIOSH Sound Level Meter ships an update every 5 months, Cuspart every 2 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | NIOSH Sound Level Meter | Cuspart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (17K ratings)](https://appshunter.io/ios/app/niosh-sound-level-meter/id1096545820/reviews)** | — |
| Number of ratings | **17K** | — |
| Positive reviews | 64.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 6 MB | 79 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [EA LAB](https://appshunter.io/developer/1005558529) | [Mustafa Tolga DALBUDAK](https://appshunter.io/developer/1479052908) |

## What reviewers say

### NIOSH Sound Level Meter

[App page](https://appshunter.io/ios/app/niosh-sound-level-meter/id1096545820)

This free app measures sound levels and noise exposure using your smartphone. Developed by acoustics experts, it provides professional-grade metrics and guidance on hearing protection and noise prevention.

**Highlights:** Sound level measurement, Noise dosimetry, Hearing hazard information, Hearing protector guidelines, Data reporting and sharing, Microphone calibration

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Free and ad-free
- 👍 Simple and intuitive interface
- ⚖️ Accurate and reliable measurements
- 💡 Useful for monitoring noise levels in various environments
- 🔍 Provides detailed noise data and exposure information

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔌 Issues with external microphone support
- 🔋 Can drain battery when running for extended periods
- 📱 Limited iPad optimization

**Reported bugs**

- Inconsistent or inaccurate readings in some cases
- Inability to properly connect and use external microphones
- Freezing or crashing when minimizing the app

**Requested features**

- Ability to save and export measurement sessions
- Option to run the app in the background while the screen is locked
- Integration with Apple Health for long-term noise exposure tracking
- Frequency-specific noise measurements (e.g., A-weighted, C-weighted)


### Cuspart

[App page](https://appshunter.io/ios/app/cuspart-db-meter/id6477875540)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $0.99 | one-time |
| Espresso | $1.49 | one-time |
| Flat White | $1.99 | one-time |
| Caffè Americano | $2.49 | one-time |
| Caffè Mocha | $2.99 | one-time |
| Classic Hot Chocolate | $3.49 | one-time |
| Special Hot Chocolate | $3.99 | one-time |


## Frequently asked questions

### Is NIOSH Sound Level Meter free?

NIOSH Sound Level Meter is free to download, with no in-app purchases.

### Is Cuspart free?

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

### Do NIOSH Sound Level Meter or Cuspart have ads?

Cuspart shows ads; NIOSH Sound Level Meter does not.

### Which is updated more often, NIOSH Sound Level Meter or Cuspart?

NIOSH Sound Level Meter ships an update every 5 months, and Cuspart every 2 months. Most recently, NIOSH Sound Level Meter was updated on November 4, 2026 and Cuspart on November 4, 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.*