# P Numbers vs Zeus Link

The clearest difference is rating: P Numbers at 4.8 against Zeus Link's 1.0. P Numbers also leads on ratings volume (5 vs 1). Zeus Link's advantage is update cadence (every 6 months vs every 39 months) and iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

P Numbers holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: P Numbers has 5 ratings behind it against 1, so its average is the more settled of the two.

P Numbers ships an update every 39 months, Zeus Link every 6 months. The most recent releases landed on October 19, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | P Numbers | Zeus Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/p-numbers/id911716649/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/zeus-link/id1625331518/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 13 MB | 95 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Holley Performance Products](https://appshunter.io/developer/1175069390) |

## What reviewers say

### P Numbers

[App page](https://appshunter.io/ios/app/p-numbers/id911716649)

Quickly access weldability grouping numbers for welding procedures and performance qualifications. This app provides data from authoritative sources like ASME Section IX and AWS B2.1.

**Highlights:** Base metal weldability grouping lookup, Welding procedure qualification data, Performance qualification data, ASME Section IX Table QW/QB-422 data, AWS B2.1 Table C1 and C2 data, ISO/TR 20173 data

**Features:** macOS Compatibility

**In-app purchases:** none


### Zeus Link

[App page](https://appshunter.io/ios/app/zeus-link/id1625331518)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is P Numbers free?

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

### Is Zeus Link free?

Zeus Link is free to download, with no in-app purchases.

### Which has better reviews, P Numbers or Zeus Link?

P Numbers is rated higher. P Numbers averages 4.8 out of 5 from 5 ratings, while Zeus Link averages 1.0 from 1 ratings.

### Do P Numbers or Zeus Link have ads?

Neither P Numbers nor Zeus Link shows ads.

### Which is updated more often, P Numbers or Zeus Link?

P Numbers ships an update every 39 months, and Zeus Link every 6 months. Most recently, P Numbers was updated on October 19, 2026 and Zeus Link on October 28, 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.*