# Optical Surface Recognition vs StressTable2023

The clearest difference is rating: Optical Surface Recognition at 5.0 against StressTable2023's 3.0. Optical Surface Recognition also leads on in-app purchases (none vs 1). StressTable2023's advantage is update cadence (daily vs every 2 weeks) and device support (4 vs 2). On price, ratings volume, ads and iOS requirement there is nothing between them.

Both are free to download. StressTable2023 sells 1 one-off in-app purchase. Optical Surface Recognition asks for nothing beyond the download.

Optical Surface Recognition holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Optical Surface Recognition ships an update every 2 weeks, StressTable2023 daily. Both last shipped on November 3, 2026.

## The numbers

| Metric | Optical Surface Recognition | StressTable2023 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optical-surface-recognition/id1480828202/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/stresstable2023/id6461216870/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 20 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [Engineering Director, Inc.](https://appshunter.io/developer/1480828201) | [Shabbir Ahmed](https://appshunter.io/developer/1083166021) |

## 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


### StressTable2023

[App page](https://appshunter.io/ios/app/stresstable2023/id6461216870)

Access material stress, physical, and mechanical properties from ASME Sec II-D. This utility provides quick determination of properties at specific temperatures for various tables, aiding in hand calculations where commercial software is unavailable.

**Highlights:** ASME Sec II-D material properties, Stress values at given temperatures, Physical and mechanical properties, Metric and US customary units, Hand calculation assistance, Supports multiple ASME tables

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Non Consumable Subscription | $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 StressTable2023 free?

StressTable2023 is free to download, with in-app purchases available.

### Which has better reviews, Optical Surface Recognition or StressTable2023?

Optical Surface Recognition is rated higher. Optical Surface Recognition averages 5.0 out of 5 from 1 ratings, while StressTable2023 averages 3.0 from 2 ratings.

### Do Optical Surface Recognition or StressTable2023 have ads?

Neither Optical Surface Recognition nor StressTable2023 shows ads.

### Which is updated more often, Optical Surface Recognition or StressTable2023?

Optical Surface Recognition ships an update every 2 weeks, and StressTable2023 daily. Most recently, Optical Surface Recognition was updated on November 3, 2026 and StressTable2023 on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*