# Optical Surface Recognition vs QuickWindChk

The clearest difference is update cadence: Optical Surface Recognition at every 2 weeks against QuickWindChk's every 3 weeks. Optical Surface Recognition also leads on iOS requirement (12.0 vs 15.1). On price, ads, 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.

Optical Surface Recognition ships an update every 2 weeks, QuickWindChk every 3 weeks. The most recent releases landed on September 20, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Optical Surface Recognition | QuickWindChk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optical-surface-recognition/id1480828202/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 17 MB | 29 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [SEUNGSOO YOU](https://appshunter.io/developer/1785034668) |

## What reviewers say

### Optical Surface Recognition

[App page](https://appshunter.io/ios/app/optical-surface-recognition/id1480828202)

This utility app uses computer vision to scan surfaces for signs of corrosion on various metal types. It allows users to capture photos and record videos of detected corrosion, saving them with a proprietary score.

**Highlights:** Detects corrosion on various metal surfaces, Scans flat metal, nails, bolts, signs, poles, grates, Captures photos with corrosion score, Records videos with corrosion score, Saves media to device photo roll

**Features:** macOS Compatibility

**In-app purchases:** none


### QuickWindChk

[App page](https://appshunter.io/ios/app/quickwindchk/id6759914140)

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

**In-app purchases:** none


## Frequently asked questions

### Is Optical Surface Recognition free?

Optical Surface Recognition is free to download, with no in-app purchases.

### Is QuickWindChk free?

QuickWindChk is free to download, with no in-app purchases.

### Do Optical Surface Recognition or QuickWindChk have ads?

Neither Optical Surface Recognition nor QuickWindChk shows ads.

### Which is updated more often, Optical Surface Recognition or QuickWindChk?

Optical Surface Recognition ships an update every 2 weeks, and QuickWindChk every 3 weeks. Most recently, Optical Surface Recognition was updated on September 20, 2026 and QuickWindChk on September 15, 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.*