# 에스원 PS 메신저 vs Decibel Meter A+

The clearest difference is review sentiment: Decibel Meter A+ at 89% against 에스원 PS 메신저's 25%. 에스원 PS 메신저's advantage is in-app purchases (none vs 3) and ads (none vs shown). 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. 에스원 PS 메신저 asks for nothing beyond the download.

에스원 PS 메신저 ships an update every 3 months, Decibel Meter A+ every 6 weeks. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 에스원 PS 메신저 | Decibel Meter A+ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | **89.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 5 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiransoft](https://appshunter.io/developer/326119493) | [BO YOUNG PARK](https://appshunter.io/developer/1291813217) |

## What reviewers say

### 에스원 PS 메신저

[App page](https://appshunter.io/ios/app/ps/id994028235)

This app facilitates secure and convenient internal communication and document sharing for businesses. It offers two message types, read receipts, message recall, and a secure file-sharing environment linked to its parent service.

**Highlights:** Two message types (mail & chat), Read receipts and message recall, Secure internal file sharing, Convenient communication for work, Safe document transfer and utilization

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 에스원 PS 메신저 free?

에스원 PS 메신저 is free to download, with no in-app purchases.

### Is Decibel Meter A+ free?

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

### Do 에스원 PS 메신저 or Decibel Meter A+ have ads?

Decibel Meter A+ shows ads; 에스원 PS 메신저 does not.

### Which is updated more often, 에스원 PS 메신저 or Decibel Meter A+?

에스원 PS 메신저 ships an update every 3 months, and Decibel Meter A+ every 6 weeks. Most recently, 에스원 PS 메신저 was updated on October 11, 2026 and Decibel Meter A+ on October 3, 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.*