# Optical Surface Recognition vs Flight Computer E6B & Toolbox

The clearest difference is in-app purchases: Optical Surface Recognition at none against Flight Computer E6B & Toolbox's 1. Optical Surface Recognition also leads on update cadence (every 2 weeks vs every 3 weeks) and iOS requirement (12.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Flight Computer E6B & Toolbox sells 1 one-off in-app purchase. Optical Surface Recognition asks for nothing beyond the download.

Optical Surface Recognition ships an update every 2 weeks, Flight Computer E6B & Toolbox every 3 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Optical Surface Recognition | Flight Computer E6B & Toolbox |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 17 MB | 27 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [AYLIN BICEN](https://appshunter.io/developer/1839275591) |

## 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


### Flight Computer E6B & Toolbox

[App page](https://appshunter.io/ios/app/flight-computer-e6b-and-toolbox/id6753596143)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flight Computer Pro Mode | $9.99 | one-time |


## Frequently asked questions

### Is Optical Surface Recognition free?

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

### Is Flight Computer E6B & Toolbox free?

Flight Computer E6B & Toolbox is free to download, with in-app purchases available.

### Do Optical Surface Recognition or Flight Computer E6B & Toolbox have ads?

Neither Optical Surface Recognition nor Flight Computer E6B & Toolbox shows ads.

### Which is updated more often, Optical Surface Recognition or Flight Computer E6B & Toolbox?

Optical Surface Recognition ships an update every 2 weeks, and Flight Computer E6B & Toolbox every 3 weeks. Most recently, Optical Surface Recognition was updated on October 7, 2026 and Flight Computer E6B & Toolbox on October 12, 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.*