# Decibel Meter Plus Pro vs NotePocket

The clearest difference is price: NotePocket at Free against Decibel Meter Plus Pro's $2.99. NotePocket also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 2 months). Decibel Meter Plus Pro's advantage is ads (none vs shown). On device support and iOS requirement there is nothing between them.

NotePocket is free to download; Decibel Meter Plus Pro costs $2.99 up front. Decibel Meter Plus Pro sells 1 one-off in-app purchase. NotePocket asks for nothing beyond the download.

Decibel Meter Plus Pro ships an update every 2 months, NotePocket every 3 weeks. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Decibel Meter Plus Pro | NotePocket |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.8 (80 ratings)](https://appshunter.io/ios/app/decibel-meter-plus-pro/id645214476/reviews)** | — |
| Number of ratings | **80** | — |
| Positive reviews | 52.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 12 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华芳 张](https://appshunter.io/developer/586041482) | [兵瑞 陈](https://appshunter.io/developer/1886012556) |

## What reviewers say

### Decibel Meter Plus Pro

[App page](https://appshunter.io/ios/app/decibel-meter-plus-pro/id645214476)

Measure the sound levels around you with this utility app. It displays average, peak, and max values, offers decibel exposure time guidelines, and provides information on noise-induced hearing loss. The app also allows data recording and export for analysis.

**Highlights:** Measure sound levels, Display average, peak, and max values, Decibel exposure time guidelines, Information on noise-induced hearing loss, Record and export data, Calibrate measurements, Universal app support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Reports | $4.99 | one-time |


### NotePocket

[App page](https://appshunter.io/ios/app/notepocket/id6769583567)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter Plus Pro free?

Decibel Meter Plus Pro costs $2.99, and also offers in-app purchases.

### Is NotePocket free?

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

### Do Decibel Meter Plus Pro or NotePocket have ads?

NotePocket shows ads; Decibel Meter Plus Pro does not.

### Which is updated more often, Decibel Meter Plus Pro or NotePocket?

Decibel Meter Plus Pro ships an update every 2 months, and NotePocket every 3 weeks. Most recently, Decibel Meter Plus Pro was updated on October 14, 2026 and NotePocket on October 1, 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.*