# dB Meter vs Plain｜騒音を検知して環境音を自動再生

The clearest difference is in-app purchases: Plain｜騒音を検知して環境音を自動再生 at none against dB Meter's 4. Plain｜騒音を検知して環境音を自動再生 also leads on ads (none vs shown) and update cadence (weekly vs every 3 months). dB Meter's advantage is iOS requirement (17.0 vs 26.2). On price and device support there is nothing between them.

Both are free to download. dB Meter sells 4 in-app purchases, starting at $1.99 per 7 days. Plain｜騒音を検知して環境音を自動再生 asks for nothing beyond the download.

dB Meter ships an update every 3 months, Plain｜騒音を検知して環境音を自動再生 weekly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | dB Meter | Plain｜騒音を検知して環境音を自動再生 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/db-meter-protect-hearing-osha/id6746041995/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 12 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [XIAOCHUAN HE](https://appshunter.io/developer/1771372726) | [KIICHI STUDIO](https://appshunter.io/developer/1855811809) |

## What reviewers say

### dB Meter

[App page](https://appshunter.io/ios/app/db-meter-protect-hearing-osha/id6746041995)

This app transforms your iPhone into a professional-grade decibel meter and noise dosimeter. It provides real-time noise data, instant alerts for unsafe levels, and location-based logging to help you protect your hearing and ensure compliance with safety standards.

**Highlights:** A-Weighted Measurement (dBA), Real-Time SPL Analytics, Instant Threshold Alerts, Location-Based Noise Logging, Apple Health Integration, Export & Share Reports

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Weekly | $1.99 | per 7 days |
| Pro - Monthly | $4.99 | per month |
| Pro - Annually | $29.99 | per year |
| Lifetime Premium | $34.99 | one-time |


### Plain｜騒音を検知して環境音を自動再生

[App page](https://appshunter.io/ios/app/plain/id6761727598)

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

**In-app purchases:** none


## Frequently asked questions

### Is dB Meter free?

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

### Is Plain｜騒音を検知して環境音を自動再生 free?

Plain｜騒音を検知して環境音を自動再生 is free to download, with no in-app purchases.

### Do dB Meter or Plain｜騒音を検知して環境音を自動再生 have ads?

dB Meter shows ads; Plain｜騒音を検知して環境音を自動再生 does not.

### Which is updated more often, dB Meter or Plain｜騒音を検知して環境音を自動再生?

dB Meter ships an update every 3 months, and Plain｜騒音を検知して環境音を自動再生 weekly. Most recently, dB Meter was updated on October 24, 2026 and Plain｜騒音を検知して環境音を自動再生 on October 14, 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.*