# SmarterNoise vs 偉恆車行

The clearest difference is in-app purchases: 偉恆車行 at none against SmarterNoise's 2. 偉恆車行 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. SmarterNoise sells 2 one-off in-app purchases. 偉恆車行 asks for nothing beyond the download.

SmarterNoise ships an update every 6 weeks, 偉恆車行 every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SmarterNoise | 偉恆車行 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (118 ratings)](https://appshunter.io/ios/app/smarternoise/id1384299042/reviews)** | — |
| Number of ratings | **118** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 15 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [Multisys Network Company Limited](https://appshunter.io/developer/1658932457) |

## 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 |


### 偉恆車行

[App page](https://appshunter.io/ios/app/whhauto/id6451449263)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmarterNoise free?

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

### Is 偉恆車行 free?

偉恆車行 is free to download, with no in-app purchases.

### Do SmarterNoise or 偉恆車行 have ads?

SmarterNoise shows ads; 偉恆車行 does not.

### Which is updated more often, SmarterNoise or 偉恆車行?

SmarterNoise ships an update every 6 weeks, and 偉恆車行 every 2 months. Most recently, SmarterNoise was updated on November 2, 2026 and 偉恆車行 on November 3, 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.*