# Decibel Meter Noise Detector vs M

The clearest difference is in-app purchases: M at none against Decibel Meter Noise Detector's 3. M also leads on update cadence (weekly vs every 5 weeks) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter Noise Detector sells 3 in-app purchases, starting at $4.99 per 7 days. M asks for nothing beyond the download.

Decibel Meter Noise Detector ships an update every 5 weeks, M weekly. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Decibel Meter Noise Detector | M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/decibel-meter-noise-detector/id6745646643/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 105 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen MC Jisu Technology Co., Ltd.](https://appshunter.io/developer/1808919688) | [AMRIT MUSIC PRIVATE LIMITED](https://appshunter.io/developer/1886067366) |

## What reviewers say

### Decibel Meter Noise Detector

[App page](https://appshunter.io/ios/app/decibel-meter-noise-detector/id6745646643)

This tool measures ambient noise levels in decibels (dB) in real-time. It allows users to record audio, capture photos with decibel data, and view historical noise level changes. Reports can be generated and exported for reference.

**Highlights:** Real-time decibel detection, Audio recording with peak decibel marking, Multimedia evidence collection with watermarks, Real-time chart display of noise changes, Historical decibel record viewing, Data detection report export

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Member | $4.99 | per 7 days |
| One year membership | $45.00 | per year |
| Life member | $19.99 | one-time |


### M

[App page](https://appshunter.io/ios/app/m-studio/id6760748869)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter Noise Detector free?

Decibel Meter Noise Detector is free to download, with in-app purchases available.

### Is M free?

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

### Do Decibel Meter Noise Detector or M have ads?

Neither Decibel Meter Noise Detector nor M shows ads.

### Which is updated more often, Decibel Meter Noise Detector or M?

Decibel Meter Noise Detector ships an update every 5 weeks, and M weekly. Most recently, Decibel Meter Noise Detector was updated on October 3, 2026 and M on October 13, 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.*