# calcISO5817 vs Material Numbers

The clearest difference is price: Material Numbers at Free against calcISO5817's $2.99. Material Numbers also leads on update cadence (every 2 days vs every 12 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Material Numbers is free to download; calcISO5817 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

calcISO5817 ships an update every 12 months, Material Numbers every 2 days. Both last shipped on October 14, 2026.

## The numbers

| Metric | calcISO5817 | Material Numbers |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calciso5817/id521567469/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 1 MB | 14 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Georg Rose](https://appshunter.io/developer/521567472) | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) |

## What reviewers say

### calcISO5817

[App page](https://appshunter.io/ios/app/calciso5817/id521567469)

This application helps welding professionals determine weld quality based on ISO 5817 standards. Input weld geometry and select imperfections to assess if a weld meets quality requirements.

**Highlights:** ISO 5817 quality level calculation, Weld geometry input, Imperfection selection, Weld OK/Not OK status, Comparison with measurements

**Features:** macOS Compatibility

**In-app purchases:** none


### Material Numbers

[App page](https://appshunter.io/ios/app/material-numbers/id6503355283)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is calcISO5817 free?

calcISO5817 costs $2.99, with no in-app purchases.

### Is Material Numbers free?

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

### Do calcISO5817 or Material Numbers have ads?

Neither calcISO5817 nor Material Numbers shows ads.

### Which is updated more often, calcISO5817 or Material Numbers?

calcISO5817 ships an update every 12 months, and Material Numbers every 2 days. Most recently, calcISO5817 was updated on October 14, 2026 and Material Numbers on October 14, 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.*