P Numbers vs Chaptr
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
P Numbers
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.
- 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
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P-Numbers: Quick lookup of base metal weldability grouping numbers for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of ASME Section IX Table QW/QB-422, AWS B2.1 Table C1 and C2, and ISO/TR 20173.
Chaptr
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.
- 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
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Create chapter marks for your audio production with your iPhone on the Go! Import your audio files from all document providing Apps like Dropbox or iCloud Drive or download them directly from the web. Add marks while listening: Click two or three times with your Apple EarPods to add marks while your iPhone is locked. You can also configure your AirPods to work with Chaptr. Chaptr is also available on your Apple Watch! Create marks from your wrist while you listen to your audio productions! Add edit marks at positions where your production needs improvement. Adjust the timecode of already created marks and move them to their exact position. Choose your favorite listening speed to work faster. Export the marks you created to * Podigee * mp4chaps file format (compatible with Reaper, Auphonic) * Reaper specific chapter marks file format (supports mark colors) * Podlove Simple Chapters Supported audio formats: MP3 und M4A
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | P Numbers | Chaptr |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.8 (5 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 39 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 26.6 |
| Further details — not scored | ||
| Size | 13 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | ASMEIX CORPORATION | Stefan Trauth |
Customer experience
P Numbers
Chaptr
In-app purchases
P Numbers
No in-app purchases
Chaptr
No in-app purchases
Questions
Is P Numbers free?
Is Chaptr free?
Which has better reviews, P Numbers or Chaptr?
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