# P Numbers vs Bluebeam

The clearest difference is review sentiment: P Numbers at 100% against Bluebeam's 3%. P Numbers also leads on rating (4.8 vs 1.5) and iOS requirement (13.0 vs 18.0). Bluebeam's advantage is update cadence (monthly vs every 39 months) and ratings volume (392 vs 5). On price, ads, in-app purchases and monetization model 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 1.5. That said, the two scores are not equally well evidenced: Bluebeam has 392 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 100% of P Numbers's written reviews are positive against 3% of Bluebeam's.

P Numbers ships an update every 39 months, Bluebeam monthly. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | P Numbers | Bluebeam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/p-numbers/id911716649/reviews)** | [1.5 (392 ratings)](https://appshunter.io/ios/app/bluebeam/id1479484276/reviews) |
| Number of ratings | 5 | **392** |
| Positive reviews | **100.0% of reviews** | 2.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Monthly** |
| Monetization | Free | Free |
| Size | 13 MB | 288 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Bluebeam, Inc.](https://appshunter.io/developer/489696449) |

## 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


### Bluebeam

[App page](https://appshunter.io/ios/app/bluebeam/id1479484276)

Access and collaborate on PDF documents directly from your mobile device. Communicate project updates with markups and work offline by syncing files. Seamlessly join live collaboration sessions and manage document revisions from the field.

**Highlights:** Real-time PDF collaboration, Markup and annotation tools, Offline file access, Document syncing, Studio Project management, Live session joining

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

**In-app purchases:** none

**What reviewers like**

- ✅ Automatic saving functionality works well
- 📱 Useful for viewing PDFs on the go
- 🔄 Good for accessing Studio sessions
- 📊 Desktop version is powerful and feature-rich
- 🎯 Cleaner, more modern interface design

**What reviewers complain about**

- ❌ Massive feature loss compared to Revu for iPad
- 🐛 Frequent crashes and freezing issues
- 📉 Severely limited markup tools and capabilities
- 🖊️ Apple Pencil input is unresponsive and laggy
- 💾 Data loss and corruption issues

**Reported bugs**

- Markups fail to load or display correctly
- App deletes markups instead of saving them
- Documents wipe clean when reopened
- Files uploaded disappear from app
- Corrupted file errors when opening PDFs

**Requested features**

- Restore measurement and scaling tools
- Add custom toolsets and tool libraries
- Implement bookmarks for document navigation
- Enable image embedding in callouts
- Add undo/redo functionality


## Frequently asked questions

### Is P Numbers free?

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

### Is Bluebeam free?

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

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

P Numbers is rated higher. P Numbers averages 4.8 out of 5 from 5 ratings, while Bluebeam averages 1.5 from 392 ratings.

### Do P Numbers or Bluebeam have ads?

Neither P Numbers nor Bluebeam shows ads.

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

P Numbers ships an update every 39 months, and Bluebeam monthly. Most recently, P Numbers was updated on June 11, 2026 and Bluebeam on September 24, 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.*