# SmarterNoise Pro 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 SmarterNoise Pro's 4. Plain｜騒音を検知して環境音を自動再生 also leads on update cadence (weekly vs monthly). SmarterNoise Pro's advantage is iOS requirement (12.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. Plain｜騒音を検知して環境音を自動再生 asks for nothing beyond the download.

SmarterNoise Pro ships an update monthly, Plain｜騒音を検知して環境音を自動再生 weekly. The most recent releases landed on September 7, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | SmarterNoise Pro | Plain｜騒音を検知して環境音を自動再生 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 12 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [KIICHI STUDIO](https://appshunter.io/developer/1855811809) |

## What reviewers say

### SmarterNoise Pro

[App page](https://appshunter.io/ios/app/smarternoise-pro/id1466745030)

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

**Highlights:** Sound level measurement in video/audio modes, Frequency spectrum display, Export measurement data (CSV), Sound level activated audio recording, Calibration tool, Full HD video recording (paid)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Camera upgrade | $0.99 | one-time |
| Frequency spectrum indicator | $1.99 | one-time |
| Video and audio recording | $1.99 | one-time |
| Spectrogram display | $1.99 | 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 SmarterNoise Pro free?

SmarterNoise Pro 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 SmarterNoise Pro or Plain｜騒音を検知して環境音を自動再生 have ads?

Neither SmarterNoise Pro nor Plain｜騒音を検知して環境音を自動再生 shows ads.

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

SmarterNoise Pro ships an update monthly, and Plain｜騒音を検知して環境音を自動再生 weekly. Most recently, SmarterNoise Pro was updated on September 7, 2026 and Plain｜騒音を検知して環境音を自動再生 on September 10, 2026.

---

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