# W/WO vs Welding Reference Pro

The clearest difference is update cadence: Welding Reference Pro at every 4 days against W/WO's monthly. W/WO's advantage is device support (4 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. W/WO sells 2 in-app purchases, starting at $7.99 per month and Welding Reference Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

W/WO ships an update monthly, Welding Reference Pro every 4 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | W/WO | Welding Reference Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/welding-reference-pro/id6761250858/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 6 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shabbir Ahmed](https://appshunter.io/developer/1083166021) | [ZIma Logistics LLC](https://appshunter.io/developer/1883563240) |

## What reviewers say

### W/WO

[App page](https://appshunter.io/ios/app/wwo-pq-flashcard/id1506354197)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Auto-Renewing Subs | $7.99 | per month |
| Annual Auto-Renewing Subs | $14.99 | per year |


### Welding Reference Pro

[App page](https://appshunter.io/ios/app/welding-reference-pro/id6761250858)

This app provides welders with essential tools, including calculators for settings and costs, comprehensive reference guides, and exam preparation modules. It offers offline access to all features, with a one-time purchase unlocking advanced calculators and exam practice.

**Highlights:** Weld setting calculators, Filler metal estimation, Unit conversion, Reference guides, Training modules, Exam preparation, Qualification tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Tools | $9.99 | one-time |


## Frequently asked questions

### Is W/WO free?

W/WO is free to download, with in-app purchases available.

### Is Welding Reference Pro free?

Welding Reference Pro is free to download, with in-app purchases available.

### Do W/WO or Welding Reference Pro have ads?

Neither W/WO nor Welding Reference Pro shows ads.

### Which is updated more often, W/WO or Welding Reference Pro?

W/WO ships an update monthly, and Welding Reference Pro every 4 days. Most recently, W/WO was updated on October 27, 2026 and Welding Reference Pro on October 31, 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.*