# Decibel Meter vs Silent Scan

The clearest difference is ads: Decibel Meter at none against Silent Scan's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Decibel Meter sells 1 one-off in-app purchase and Silent Scan sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Decibel Meter ships an update every 5 weeks, Silent Scan every 3 weeks. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Decibel Meter | Silent Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 3 MB | 35 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [博 彭](https://appshunter.io/developer/1293268076) | [Yasuhiro Kodama](https://appshunter.io/developer/1895805086) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-noisescope/id6760281155)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro永久版 | $1.99 | one-time |


### Silent Scan

[App page](https://appshunter.io/ios/app/silent-scan/id6764492794)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $1.99 | per month |


## Frequently asked questions

### Is Decibel Meter free?

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

### Is Silent Scan free?

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

### Do Decibel Meter or Silent Scan have ads?

Silent Scan shows ads; Decibel Meter does not.

### Which is updated more often, Decibel Meter or Silent Scan?

Decibel Meter ships an update every 5 weeks, and Silent Scan every 3 weeks. Most recently, Decibel Meter was updated on September 8, 2026 and Silent Scan on September 14, 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.*