# P Numbers vs Chaptr

The clearest difference is price: P Numbers at Free against Chaptr's $2.99. P Numbers also leads on rating (4.8 vs 4.5) and iOS requirement (13.0 vs 26.6). Chaptr's advantage is update cadence (every 6 weeks vs every 39 months). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

P Numbers is free to download; Chaptr costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

P Numbers holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

P Numbers ships an update every 39 months, Chaptr every 6 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | P Numbers | Chaptr |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/p-numbers/id911716649/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/chaptr/id1148381183/reviews) |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 6 weeks** |
| Monetization | **Free** | Paid |
| Size | 13 MB | 1 MB |
| Requires iOS | **13.0** | 26.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Stefan Trauth](https://appshunter.io/developer/1073103749) |

## 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


### Chaptr

[App page](https://appshunter.io/ios/app/chaptr/id1148381183)

Easily create chapter marks for audio productions on your iPhone or Apple Watch. Import audio files, add marks with simple clicks, and export them in various podcast-friendly formats. Adjust mark timing and listening speed for efficient workflow.

**Highlights:** Create chapter marks on iPhone and Apple Watch, Import audio from cloud services or web, Add marks with simple earbud clicks, Edit mark timecodes, Adjust playback speed, Export to multiple podcast formats

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is P Numbers free?

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

### Is Chaptr free?

Chaptr costs $2.99, with no in-app purchases.

### Which has better reviews, P Numbers or Chaptr?

P Numbers is rated higher. P Numbers averages 4.8 out of 5 from 5 ratings, while Chaptr averages 4.5 from 2 ratings.

### Do P Numbers or Chaptr have ads?

Neither P Numbers nor Chaptr shows ads.

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

P Numbers ships an update every 39 months, and Chaptr every 6 weeks. Most recently, P Numbers was updated on November 1, 2026 and Chaptr on November 2, 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.*