# JEMiSys eTools vs Decibel meter test

The clearest difference is in-app purchases: JEMiSys eTools at none against Decibel meter test's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decibel meter test sells 1 in-app purchase, starting at $6.99 per 7 days. JEMiSys eTools asks for nothing beyond the download.

JEMiSys eTools ships an update fortnightly, Decibel meter test every 4 weeks. The most recent releases landed on October 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | JEMiSys eTools | Decibel meter test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-meter-test/id6742873854/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | — | Freemium |
| Size | 54 MB | 37 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jemisys Software](https://appshunter.io/developer/1454361869) | [玉珍 李](https://appshunter.io/developer/1547803211) |

## What reviewers say

### JEMiSys eTools

[App page](https://appshunter.io/ios/app/jemisys-etools/id1521267010)

**In-app purchases:** none


### Decibel meter test

[App page](https://appshunter.io/ios/app/decibel-meter-test/id6742873854)

This tool measures environmental noise levels in real-time, records test history, and helps manage noisy surroundings. It offers precise decibel readings and scene capture for analysis.

**Highlights:** Real-time decibel testing, Surrounding noise detection, Scene capture with noise levels, Automatic test record saving, Historical measurement analysis, Simple and easy to use

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One week membership | $6.99 | per 7 days |


## Frequently asked questions

### Is JEMiSys eTools free?

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

### Is Decibel meter test free?

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

### Do JEMiSys eTools or Decibel meter test have ads?

Neither JEMiSys eTools nor Decibel meter test shows ads.

### Which is updated more often, JEMiSys eTools or Decibel meter test?

JEMiSys eTools ships an update fortnightly, and Decibel meter test every 4 weeks. Most recently, JEMiSys eTools was updated on October 6, 2026 and Decibel meter test on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*