# Welding Toolbox 2 vs USM Enrich

The clearest difference is price: USM Enrich at Free against Welding Toolbox 2's $7.99. USM Enrich also leads on update cadence (every 9 months vs every 29 months) and iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

USM Enrich is free to download; Welding Toolbox 2 costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Welding Toolbox 2 ships an update every 29 months, USM Enrich every 9 months. The most recent releases landed on September 15, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Welding Toolbox 2 | USM Enrich |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 9 months** |
| Monetization | Paid | — |
| Size | 29 MB | 19 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Parsify Technologies Antoni Kepinski](https://appshunter.io/developer/1546617908) | [家敏 雷](https://appshunter.io/developer/1535169483) |

## What reviewers say

### Welding Toolbox 2

[App page](https://appshunter.io/ios/app/welding-toolbox-2/id1546617906)

This app provides essential tools for welding inspection, including calculators for heat input, equivalent carbon content, critical metal parameters, and pitting resistance. It supports both metric and imperial systems and allows for data export.

**Highlights:** Heat input calculator, Equivalent carbon content calculator, Critical metal parameter calculator, Pitting resistance calculator, Metric & imperial system support, Result history and export, Open-source

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

**In-app purchases:** none


### USM Enrich

[App page](https://appshunter.io/ios/app/usm-enrich/id1570088544)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Welding Toolbox 2 free?

Welding Toolbox 2 costs $7.99, with no in-app purchases.

### Is USM Enrich free?

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

### Do Welding Toolbox 2 or USM Enrich have ads?

Neither Welding Toolbox 2 nor USM Enrich shows ads.

### Which is updated more often, Welding Toolbox 2 or USM Enrich?

Welding Toolbox 2 ships an update every 29 months, and USM Enrich every 9 months. Most recently, Welding Toolbox 2 was updated on September 15, 2026 and USM Enrich on September 11, 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.*