# CSASコントローラ vs Decibel dB

The clearest difference is in-app purchases: CSASコントローラ at none against Decibel dB's 6. CSASコントローラ also leads on iOS requirement (10.0 vs 12.4). Decibel dB's advantage is update cadence (every 4 months vs every 66 months). On price and device support there is nothing between them.

Both are free to download. Decibel dB sells 6 in-app purchases, starting at $3.99 per 7 days. CSASコントローラ asks for nothing beyond the download.

CSASコントローラ ships an update every 66 months, Decibel dB every 4 months. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CSASコントローラ | Decibel dB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (684 ratings)](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399/reviews)** |
| Number of ratings | — | **684** |
| Positive reviews | — | 77.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 66 months | **Every 4 months** |
| Monetization | — | Subscription |
| Size | 9 MB | 32 MB |
| Requires iOS | **10.0** | 12.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [New-Era Co., Ltd.](https://appshunter.io/developer/1375376936) | [ITincubator UAB](https://appshunter.io/developer/1617775851) |

## What reviewers say

### CSASコントローラ

[App page](https://appshunter.io/ios/app/csas/id1375376937)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel dB

[App page](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1644852399)

Measure ambient noise and sound levels in real-time with this tool. It helps control noise pollution and protect user health by displaying decibel values numerically and graphically. Track exposure over time with NIOSH and OSHA compliant measurements.

**Highlights:** Measure noise in decibels (dB), Track MIN, AVG, MAX sound levels, Record and export measurements, Overlay noise levels on photos/videos, NIOSH and OSHA compliant meter

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Level Meter Pro | $3.99 | per 7 days |
| Weekly Access | $3.99 | per 7 days |
| Decibel Meter: Pro Version | $6.99 | per month |
| Monthly Access | $6.99 | per month |
| Noise Level Meter (dB) Pro | $12.99 | per year |
| Yearly Access | $12.99 | per year |

**What reviewers like**

- 👍 Accurate and reliable measurements
- 🚀 Easy to use interface
- 💡 Innovative features like photo/video noise overlay
- 👍 Compliant with industry standards
- 👍 Detailed noise tracking and monitoring

**What reviewers complain about**

- 🐛 Inconsistent accuracy compared to other apps
- 🐛 Doesn't detect loud noises accurately

**Reported bugs**

- Inaccurate decibel readings in some environments
- Occasional crashes or freezes

**Requested features**

- Ability to record and export noise measurements
- Integration with smart home devices


## Frequently asked questions

### Is CSASコントローラ free?

CSASコントローラ is free to download, with no in-app purchases.

### Is Decibel dB free?

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

### Which is updated more often, CSASコントローラ or Decibel dB?

CSASコントローラ ships an update every 66 months, and Decibel dB every 4 months. Most recently, CSASコントローラ was updated on October 26, 2026 and Decibel dB on October 30, 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.*