# SmarterNoise 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's 2. 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 6 weeks). SmarterNoise's advantage is iOS requirement (12.0 vs 26.2). On price and device support there is nothing between them.

Both are free to download. SmarterNoise sells 2 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 ships an update every 6 weeks, Plain｜騒音を検知して環境音を自動再生 weekly. The most recent releases landed on August 11, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | SmarterNoise | Plain｜騒音を検知して環境音を自動再生 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (115 ratings)](https://appshunter.io/ios/app/smarternoise/id1384299042/reviews)** | — |
| Number of ratings | **115** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 27 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

[App page](https://appshunter.io/ios/app/smarternoise/id1384299042)

This app measures sound levels, records audio and video, and provides information on noise exposure risks. It features smart icons to help users understand the impact of noise on health and cognitive performance. Save, share, and archive your recordings with this comprehensive tool.

**Highlights:** Sound level measurement, Video and audio recording, Noise exposure risk information, Smart icons for health impact, Archive and sharing of recordings, Calibration, Location and time display

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Long-term measurement | $1.99 | one-time |
| Remove ads | $2.99 | 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 free?

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

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

SmarterNoise ships an update every 6 weeks, and Plain｜騒音を検知して環境音を自動再生 weekly. Most recently, SmarterNoise was updated on August 11, 2026 and Plain｜騒音を検知して環境音を自動再生 on September 10, 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.*