# ScaleBook vs Decibel Meter · Sound Level

The clearest difference is in-app purchases: ScaleBook at none against Decibel Meter · Sound Level's 3. ScaleBook also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decibel Meter · Sound Level sells 3 in-app purchases, starting at $7.99 per 7 days. ScaleBook asks for nothing beyond the download.

ScaleBook ships an update fortnightly, Decibel Meter · Sound Level every 3 weeks. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | ScaleBook | Decibel Meter · Sound Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (39 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-level/id6797502695/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 52 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anatol Karamanyan](https://appshunter.io/developer/1874010381) | [Desidari Holding Ltd.](https://appshunter.io/developer/1576843270) |

## What reviewers say

### ScaleBook

[App page](https://appshunter.io/ios/app/scalebook/id6767479602)

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

**In-app purchases:** none


### Decibel Meter · Sound Level

[App page](https://appshunter.io/ios/app/decibel-meter-sound-level/id6797502695)

This tool transforms your phone into a sound level meter, displaying real-time decibel readings. It tracks current, minimum, average, and maximum levels, with options to set custom noise thresholds and save measurement history. Export your data for further analysis.

**Highlights:** Real-time sound level meter, Current, min, avg, max dB tracking, Custom noise threshold alerts, Measurement history and analysis, Exportable results, Real-time noise graph

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Weekly | $7.99 | per 7 days |
| Decibel Meter Annual | $24.99 | per year |
| Decibel Meter Yearly | $49.99 | per year |


## Frequently asked questions

### Is ScaleBook free?

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

### Is Decibel Meter · Sound Level free?

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

### Do ScaleBook or Decibel Meter · Sound Level have ads?

Neither ScaleBook nor Decibel Meter · Sound Level shows ads.

### Which is updated more often, ScaleBook or Decibel Meter · Sound Level?

ScaleBook ships an update fortnightly, and Decibel Meter · Sound Level every 3 weeks. Most recently, ScaleBook was updated on October 31, 2026 and Decibel Meter · Sound Level on November 10, 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.*