# Decibel Meter vs 纳故eHR

The clearest difference is in-app purchases: 纳故eHR at none against Decibel Meter's 4. Decibel Meter's advantage is update cadence (monthly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter sells 4 in-app purchases, starting at $3.99 per month. 纳故eHR asks for nothing beyond the download.

Decibel Meter ships an update monthly, 纳故eHR every 2 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Decibel Meter | 纳故eHR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (363 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-db-level/id1382533198/reviews)** | — |
| Number of ratings | **363** | — |
| Positive reviews | 93.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Subscription | — |
| Size | 68 MB | 37 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [传胜 贾](https://appshunter.io/developer/789568029) | [向明 杭](https://appshunter.io/developer/1234441751) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-sound-db-level/id1382533198)

Measure ambient sound levels with high precision and real-time updates. Get detailed reports and location-based measurements. This app offers a simple, secure interface for understanding noise levels around you.

**Highlights:** High-precision measurement, Real-time measurement, Location information measurement, Detailed measurement report, Simple one-click measurement, No advertising

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP按月订阅 | $3.99 | per month |
| VIP 按年订阅 | $16.99 | per year |
| 1元下载 | $0.99 | one-time |
| VIP 永久 | $14.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 📊 Generates detailed reports
- 🔍 Accurate noise measurements
- 🎥 Ability to record and take photos

**What reviewers complain about**

- 🔒 Requires 5-star review to unlock full features
- 💰 Some features locked behind paywall
- 🌐 Language translation issues
- 🔋 High battery consumption

**Reported bugs**

- Occasional app crashes
- Inconsistent measurement accuracy

**Requested features**

- Add more language support
- Improve free version functionality
- Provide more detailed analysis and charting


### 纳故eHR

[App page](https://appshunter.io/ios/app/ehr/id6736674319)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter free?

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

### Is 纳故eHR free?

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

### Do Decibel Meter or 纳故eHR have ads?

Both Decibel Meter and 纳故eHR show ads.

### Which is updated more often, Decibel Meter or 纳故eHR?

Decibel Meter ships an update monthly, and 纳故eHR every 2 months. Most recently, Decibel Meter was updated on November 6, 2026 and 纳故eHR on October 30, 2026.

---

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