# Decibel Meter A+ vs NTN

The clearest difference is in-app purchases: NTN at none against Decibel Meter A+'s 3. NTN also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Decibel Meter A+ sells 3 one-off in-app purchases. NTN asks for nothing beyond the download.

Decibel Meter A+ ships an update every 6 weeks, NTN every 2 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Decibel Meter A+ | NTN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 89.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 3 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BO YOUNG PARK](https://appshunter.io/developer/1291813217) | [Globalsat Technology Corporation.](https://appshunter.io/developer/624997558) |

## What reviewers say

### Decibel Meter A+

[App page](https://appshunter.io/ios/app/decibel-meter-a-plus/id6450104699)

This app measures and analyzes environmental noise in real time, providing accurate dB levels and statistical data. It features a simple interface for detecting subtle noises, with recording and sharing capabilities to manage noise data effectively and promote a safer environment.

**Highlights:** Real-time dB level monitoring, Environmental noise analysis, Noise measurement recording, Data sharing capabilities, Intuitive user interface, Statistical data generation

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Coffee for App Developers | $1.99 | one-time |
| Coffee + Cake for App Devs | $3.99 | one-time |


### NTN

[App page](https://appshunter.io/ios/app/ntn-520/id6755095213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter A+ free?

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

### Is NTN free?

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

### Do Decibel Meter A+ or NTN have ads?

Decibel Meter A+ shows ads; NTN does not.

### Which is updated more often, Decibel Meter A+ or NTN?

Decibel Meter A+ ships an update every 6 weeks, and NTN every 2 months. Most recently, Decibel Meter A+ was updated on November 3, 2026 and NTN on October 25, 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.*