# P Numbers vs ListAIse

The clearest difference is in-app purchases: P Numbers at none against ListAIse's 2. P Numbers also leads on iOS requirement (13.0 vs 16.0). ListAIse's advantage is update cadence (every 8 days vs every 39 months). On price, ads and device support there is nothing between them.

Both are free to download. ListAIse sells 2 in-app purchases, starting at $1.99 per month. P Numbers asks for nothing beyond the download.

P Numbers ships an update every 39 months, ListAIse every 8 days. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | P Numbers | ListAIse |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 13 MB | 169 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Syed Raza Abbas Naqvi](https://appshunter.io/developer/1808845257) |

## 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


### ListAIse

[App page](https://appshunter.io/ios/app/listaise/id6745316778)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ListAIse Premium Monthly | $1.99 | per month |
| ListAIse Premium Yearly | $19.99 | per year |


## Frequently asked questions

### Is P Numbers free?

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

### Is ListAIse free?

ListAIse is free to download, with in-app purchases available.

### Do P Numbers or ListAIse have ads?

Neither P Numbers nor ListAIse shows ads.

### Which is updated more often, P Numbers or ListAIse?

P Numbers ships an update every 39 months, and ListAIse every 8 days. Most recently, P Numbers was updated on October 2, 2026 and ListAIse 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.*