# Optical Surface Recognition vs Networks Previewer

The clearest difference is update cadence: Optical Surface Recognition at every 2 weeks against Networks Previewer's every 5 weeks. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Optical Surface Recognition against 5.0 for Networks Previewer. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Optical Surface Recognition ships an update every 2 weeks, Networks Previewer every 5 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Optical Surface Recognition | Networks Previewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/optical-surface-recognition/id1480828202/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/networks-previewer/id6473803640/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 17 MB | 30 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [MINDS.ORG, INC.](https://appshunter.io/developer/961771927) |

## 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


### Networks Previewer

[App page](https://appshunter.io/ios/app/networks-previewer/id6473803640)

Instantly preview your custom social network app configuration on your mobile device. Scan a QR code to experience your own social network app in real-time. Ideal for network administrators to test their app setup.

**Highlights:** Build social network apps, Preview mobile app configuration, Scan QR codes for instant launch, Experience own social network app, Real-time configuration testing

**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 Networks Previewer free?

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

### Which has better reviews, Optical Surface Recognition or Networks Previewer?

Optical Surface Recognition and Networks Previewer are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Optical Surface Recognition or Networks Previewer have ads?

Neither Optical Surface Recognition nor Networks Previewer shows ads.

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

Optical Surface Recognition ships an update every 2 weeks, and Networks Previewer every 5 weeks. Most recently, Optical Surface Recognition was updated on November 3, 2026 and Networks Previewer on October 30, 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.*