# Simple Noise Meter vs Decibel Shield

The clearest difference is rating: Decibel Shield at 4.7 against Simple Noise Meter's 4.0. Decibel Shield also leads on ads (none vs shown) and update cadence (daily vs every 2 months). Simple Noise Meter's advantage is iOS requirement (12.0 vs 15.6). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Simple Noise Meter sells 2 one-off in-app purchases and Decibel Shield sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel Shield holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Decibel Shield has 632 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of Simple Noise Meter's written reviews are positive against 77% of Decibel Shield's.

Simple Noise Meter ships an update every 2 months, Decibel Shield daily. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Simple Noise Meter | Decibel Shield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/simple-noise-meter/id1630705039/reviews) | **[4.7 (632 ratings)](https://appshunter.io/ios/app/decibel-shield-db-meter/id6461600902/reviews)** |
| Number of ratings | 1 | **632** |
| Positive reviews | 57.1% of reviews | **76.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 42 MB | 43 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NAOYA ONO](https://appshunter.io/developer/1530328146) | [APPSTACK LLC](https://appshunter.io/developer/1454414263) |

## What reviewers say

### Simple Noise Meter

[App page](https://appshunter.io/ios/app/simple-noise-meter/id1630705039)

Measure ambient sound levels in decibels with this straightforward utility. It provides a simple interface to start, stop, and reset noise measurements, offering a supplementary tool for understanding your environment's acoustics.

**Highlights:** Real-time decibel measurement, Start, stop, and reset functions, Calibration for accuracy, Supplementary measurement tool, Easy-to-use interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $0.99 | one-time |
| Remove ads | $3.99 | one-time |


### Decibel Shield

[App page](https://appshunter.io/ios/app/decibel-shield-db-meter/id6461600902)

Measure and track sound levels in real-time with this user-friendly decibel meter. Log historical data, integrate with Apple Health, and gain insights into your sound environment. Includes a white noise generator for focused listening.

**Highlights:** Real-time decibel monitoring, Historical data tracking, Apple Health integration, White noise generator, iCloud sync, Location tagging, Background processing

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Monthly | $4.99 | per month |
| Annual Membership | $44.99 | per year |
| Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is Simple Noise Meter free?

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

### Is Decibel Shield free?

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

### Which has better reviews, Simple Noise Meter or Decibel Shield?

Decibel Shield is rated higher. Simple Noise Meter averages 4.0 out of 5 from 1 ratings, while Decibel Shield averages 4.7 from 632 ratings.

### Do Simple Noise Meter or Decibel Shield have ads?

Simple Noise Meter shows ads; Decibel Shield does not.

### Which is updated more often, Simple Noise Meter or Decibel Shield?

Simple Noise Meter ships an update every 2 months, and Decibel Shield daily. Most recently, Simple Noise Meter was updated on October 7, 2026 and Decibel Shield on October 21, 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.*