# P Numbers vs Arresto Connect +

The clearest difference is update cadence: Arresto Connect + at every 2 months against P Numbers's every 39 months. Arresto Connect + also leads on 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 ships an update every 39 months, Arresto Connect + every 2 months. The most recent releases landed on October 19, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | P Numbers | Arresto Connect + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/p-numbers/id911716649/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 13 MB | 52 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Arresto Solutions Private Limited](https://appshunter.io/developer/1444831394) |

## 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


### Arresto Connect +

[App page](https://appshunter.io/ios/app/arresto-connect-plus/id1540056961)

**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 Arresto Connect + free?

Arresto Connect + is free to download, with no in-app purchases.

### Do P Numbers or Arresto Connect + have ads?

Neither P Numbers nor Arresto Connect + shows ads.

### Which is updated more often, P Numbers or Arresto Connect +?

P Numbers ships an update every 39 months, and Arresto Connect + every 2 months. Most recently, P Numbers was updated on October 19, 2026 and Arresto Connect + on October 27, 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.*