# Compare Flow vs Bluebeam

The clearest difference is review sentiment: Compare Flow at 50% against Bluebeam's 3%. Compare Flow also leads on rating (4.6 vs 1.5) and iOS requirement (15.1 vs 18.0). Bluebeam's advantage is update cadence (monthly vs every 32 months) and ratings volume (409 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.

Compare Flow holds the better App Store score, 4.6 against 1.5. That said, the two scores are not equally well evidenced: Bluebeam has 409 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Compare Flow's written reviews are positive against 3% of Bluebeam's.

Compare Flow ships an update every 32 months, Bluebeam monthly. Both last shipped on October 29, 2026.

## The numbers

| Metric | Compare Flow | Bluebeam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/compare-flow/id581217854/reviews)** | [1.5 (409 ratings)](https://appshunter.io/ios/app/bluebeam/id1479484276/reviews) |
| Number of ratings | 5 | **409** |
| Positive reviews | **50.0% of reviews** | 2.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Monthly** |
| Monetization | Free | Free |
| Size | 23 MB | 295 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iENGINEERING Corporation](https://appshunter.io/developer/419618955) | [Bluebeam, Inc.](https://appshunter.io/developer/489696449) |

## What reviewers say

### Compare Flow

[App page](https://appshunter.io/ios/app/compare-flow/id581217854)

This application helps engineers and designers evaluate the hydraulic flow capacity of various non-pressure sewer pipe types. It allows for comparisons between different pipe geometries and materials, including concrete, thermoplastic, and metal options.

**Highlights:** Manning's Formula calculation, Compare hydraulic flow capacity, Evaluate pipe geometry alternatives, Compare pipe material options, Supports concrete, thermoplastic, and metal pipes, Circular, elliptical, arch, and box sections

**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 Compare Flow free?

Compare Flow 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, Compare Flow or Bluebeam?

Compare Flow is rated higher. Compare Flow averages 4.6 out of 5 from 5 ratings, while Bluebeam averages 1.5 from 409 ratings.

### Do Compare Flow or Bluebeam have ads?

Neither Compare Flow nor Bluebeam shows ads.

### Which is updated more often, Compare Flow or Bluebeam?

Compare Flow ships an update every 32 months, and Bluebeam monthly. Most recently, Compare Flow was updated on October 29, 2026 and Bluebeam on October 29, 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.*