# Optical Surface Recognition vs Room Layout Sketch

The clearest difference is iOS requirement: Optical Surface Recognition at 12.0 against Room Layout Sketch's 15.6. On price, update cadence, ads and in-app purchases 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, Room Layout Sketch fortnightly. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Optical Surface Recognition | Room Layout Sketch |
| --- | --- | --- |
| 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** | Fortnightly |
| Monetization | Free | — |
| Size | 17 MB | 44 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [Venus Windsor](https://appshunter.io/developer/6780373588) |

## 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


### Room Layout Sketch

[App page](https://appshunter.io/ios/app/room-layout-sketch/id6780373586)

**Features:** macOS Compatibility

**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 Room Layout Sketch free?

Room Layout Sketch is free to download, with no in-app purchases.

### Do Optical Surface Recognition or Room Layout Sketch have ads?

Neither Optical Surface Recognition nor Room Layout Sketch shows ads.

### Which is updated more often, Optical Surface Recognition or Room Layout Sketch?

Optical Surface Recognition ships an update every 2 weeks, and Room Layout Sketch fortnightly. Most recently, Optical Surface Recognition was updated on October 7, 2026 and Room Layout Sketch on October 8, 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.*