# Optical Surface Recognition vs iKeyProximityFingerprint

The clearest difference is update cadence: Optical Surface Recognition at every 2 weeks against iKeyProximityFingerprint's every 11 months. 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, iKeyProximityFingerprint every 11 months. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Optical Surface Recognition | iKeyProximityFingerprint |
| --- | --- | --- |
| 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 11 months |
| Monetization | Free | — |
| Size | 17 MB | 16 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [iKey CORP](https://appshunter.io/developer/477962700) |

## 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


### iKeyProximityFingerprint

[App page](https://appshunter.io/ios/app/ikeyproximityfingerprint/id1489684781)

**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 iKeyProximityFingerprint free?

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

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

Neither Optical Surface Recognition nor iKeyProximityFingerprint shows ads.

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

Optical Surface Recognition ships an update every 2 weeks, and iKeyProximityFingerprint every 11 months. Most recently, Optical Surface Recognition was updated on October 7, 2026 and iKeyProximityFingerprint on October 25, 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.*