# Decibel Meter Plus vs EVJN

The clearest difference is price: EVJN at Free against Decibel Meter Plus's $0.99. EVJN also leads on iOS requirement (12.4 vs 15.8). Decibel Meter Plus's advantage is update cadence (every 6 weeks vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

EVJN is free to download; Decibel Meter Plus costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Decibel Meter Plus ships an update every 6 weeks, EVJN every 4 months. Both last shipped on October 19, 2026.

## The numbers

| Metric | Decibel Meter Plus | EVJN |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (125 ratings)](https://appshunter.io/ios/app/decibel-meter-plus/id648142711/reviews)** | — |
| Number of ratings | **125** | — |
| Positive reviews | 35.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 16 MB |
| Requires iOS | 15.8 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [华芳 张](https://appshunter.io/developer/586041482) | [The Boring Two Cents Games Inc.](https://appshunter.io/developer/1697647168) |

## What reviewers say

### Decibel Meter Plus

[App page](https://appshunter.io/ios/app/decibel-meter-plus/id648142711)

Measure ambient sound levels and understand their impact on hearing. This app provides real-time decibel readings, exposure time guidelines, and information on noise-induced hearing loss. It helps you identify loud environments and learn how to protect your hearing.

**Highlights:** Measure sound levels, Display average, peak, and max values, Plotted history of average values, Information on NIHL, Decibel exposure time guidelines, Calibrate measurements, Record and export data

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and simple interface
- 📊 Clear visual display with color-coded sound levels
- 🎯 Useful for comparative measurements
- 📈 Includes graphical strip chart functionality
- ⚡ Responsive and quick performance

**What reviewers complain about**

- ❌ Severely inaccurate decibel readings
- 📍 Consistently reads 10-50 dB higher than actual levels
- 🔧 No calibration function available
- 🐛 Doesn't return to 0 dB in silent conditions
- 📱 Requires app updates and iOS compatibility fixes

**Reported bugs**

- App requires developer updates and iOS compatibility fixes
- Baseline reading of 50-80 dB even in complete silence
- Readings spike dramatically with minimal sound input
- Graph display lacks user control
- Inconsistent measurements in same environment

**Requested features**

- Calibration function to adjust readings
- Higher maximum dB limit (120+ dB) for loud events
- Ability to attach photos with meter readings
- Better baseline reset to 0 dB in silence
- dB(A) weighting filter option


### EVJN

[App page](https://appshunter.io/ios/app/evjn/id6474639065)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter Plus free?

Decibel Meter Plus costs $0.99, with no in-app purchases.

### Is EVJN free?

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

### Do Decibel Meter Plus or EVJN have ads?

Neither Decibel Meter Plus nor EVJN shows ads.

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

Decibel Meter Plus ships an update every 6 weeks, and EVJN every 4 months. Most recently, Decibel Meter Plus was updated on October 19, 2026 and EVJN on October 19, 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.*