# Decibel Master X vs Plain｜騒音を検知して環境音を自動再生

The clearest difference is ads: Plain｜騒音を検知して環境音を自動再生 at none against Decibel Master X's shown. Decibel Master X's advantage is iOS requirement (15.0 vs 26.2). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Decibel Master X ships an update fortnightly, 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 25, 2026 respectively.

## The numbers

| Metric | Decibel Master X | Plain｜騒音を検知して環境音を自動再生 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 37 MB | 12 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [youngjin kim](https://appshunter.io/developer/1884548375) | [KIICHI STUDIO](https://appshunter.io/developer/1855811809) |

## What reviewers say

### Decibel Master X

[App page](https://appshunter.io/ios/app/decibel-master-x-noise-meter/id6760926108)

This app offers precise real-time decibel monitoring with a visually stunning, skeuomorphic interface. It features detailed textures, intuitive layouts, and dynamic visual feedback, transforming your device into a sophisticated measurement tool. Record ambient sounds locally with total privacy.

**Highlights:** Skeuomorphic design, Real-time decibel tracking, Visual waveform graphs, High-quality sound recording, Local data storage, Intuitive interface

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

**In-app purchases:** none


### 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 Decibel Master X free?

Decibel Master X is free to download, with no in-app purchases.

### 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 Decibel Master X or Plain｜騒音を検知して環境音を自動再生 have ads?

Decibel Master X 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, Decibel Master X or Plain｜騒音を検知して環境音を自動再生?

Decibel Master X ships an update fortnightly, and Plain｜騒音を検知して環境音を自動再生 weekly. Most recently, Decibel Master X 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 25, 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.*