# Decibel Meter Sound Level dB vs IAQ Solution

The clearest difference is in-app purchases: IAQ Solution at none against Decibel Meter Sound Level dB's 4. IAQ Solution also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Decibel Meter Sound Level dB sells 4 in-app purchases, starting at $4.99 per 7 days. IAQ Solution asks for nothing beyond the download.

Decibel Meter Sound Level dB ships an update every 3 months, IAQ Solution every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Decibel Meter Sound Level dB | IAQ Solution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (24 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-level-db/id1609178369/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 24 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [汇杭 钟](https://appshunter.io/developer/1481585840) | [DONG YEON KIM](https://appshunter.io/developer/1817710997) |

## What reviewers say

### Decibel Meter Sound Level dB

[App page](https://appshunter.io/ios/app/decibel-meter-sound-level-db/id1609178369)

This tool transforms your iPhone into a professional sound level meter. It measures noise levels, tracks daily noise exposure, and can record video with embedded decibel data for evidence. Analyze sound frequencies and generate reports for workplace compliance or noise complaints.

**Highlights:** Professional noise dosimeter, OSHA & NIOSH standards compliance, Video recording with dB overlay, Spectrum analyzer (RTA), PDF report export, Calibration for accuracy, Background measurement mode

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $5.99 | per month |
| Premium Yearly | $29.99 | per year |
| Lifetime Premium | $49.99 | one-time |


### IAQ Solution

[App page](https://appshunter.io/ios/app/iaq-solution/id6746661280)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter Sound Level dB free?

Decibel Meter Sound Level dB is free to download, with in-app purchases available.

### Is IAQ Solution free?

IAQ Solution is free to download, with no in-app purchases.

### Do Decibel Meter Sound Level dB or IAQ Solution have ads?

Decibel Meter Sound Level dB shows ads; IAQ Solution does not.

### Which is updated more often, Decibel Meter Sound Level dB or IAQ Solution?

Decibel Meter Sound Level dB ships an update every 3 months, and IAQ Solution every 2 months. Most recently, Decibel Meter Sound Level dB was updated on October 24, 2026 and IAQ Solution on October 25, 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.*