# ATC Mobile vs Decibel Meter Sound Level dB

The clearest difference is in-app purchases: ATC Mobile at none against Decibel Meter Sound Level dB's 4. ATC Mobile also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.6). Decibel Meter Sound Level dB's advantage is update cadence (every 3 months vs every 16 months). On price 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. ATC Mobile asks for nothing beyond the download.

ATC Mobile ships an update every 16 months, Decibel Meter Sound Level dB every 3 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ATC Mobile | Decibel Meter Sound Level dB |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 19 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Globus Sistemas Eletronicos Ltda](https://appshunter.io/developer/1211409010) | [汇杭 钟](https://appshunter.io/developer/1481585840) |

## What reviewers say

### ATC Mobile

[App page](https://appshunter.io/ios/app/atc-mobile/id1552762275)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is ATC Mobile free?

ATC Mobile is free to download, with no in-app purchases.

### Is Decibel Meter Sound Level dB free?

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

### Do ATC Mobile or Decibel Meter Sound Level dB have ads?

Decibel Meter Sound Level dB shows ads; ATC Mobile does not.

### Which is updated more often, ATC Mobile or Decibel Meter Sound Level dB?

ATC Mobile ships an update every 16 months, and Decibel Meter Sound Level dB every 3 months. Most recently, ATC Mobile was updated on November 7, 2026 and Decibel Meter Sound Level dB on November 3, 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.*