Compare Flow vs Bluebeam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compare Flow
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.
- 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
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Compare Flow app uses Manning's Formula, the most widely accepted formula for evaluating the hydraulic capacity of non-pressure sewers. In order to evaluate possible alternatives in either pipe geometry or material, use this app to compare the hydraulic flow capacity among various concrete pipes including circular, elliptical, arch and box sections with circular thermoplastic and corrugated metal pipes.
Bluebeam
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.
- Real-time PDF collaboration
- Markup and annotation tools
- Offline file access
- Document syncing
- Studio Project management
- Live session joining
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Bluebeam for iOS keeps you connected to your teams and documents, so you can quickly access the information you need in the field and capture what matters for the office. - Communicate with markups using tools like callouts, text, clouds, and status indicators - Import your team's custom Tool Sets from Revu, so your standardized markups are ready to go in the field, even offline - Attach photos captured in the field directly to a markup, so supporting documentation stays organized without cluttering your drawings - Open your files stored on your device, Studio Projects, or Studio Sessions - Join Studio Sessions for live collaboration. If your connection drops, your changes sync when you're back online - Check out files in Studio Projects to make edits, then check them back in when you're ready - Work offline by syncing Project files ahead of time or opening PDFs stored on your device Whether you’re reviewing submittals, placing markups in the field, or tracking revisions with your team, Bluebeam gives you the flexibility to get the job done from anywhere.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Compare Flow | Bluebeam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5 ratings) — better | 1.5 (409 ratings) |
| Positive reviews | 50.0% of reviews — better | 2.9% of reviews |
| Number of ratings | 5 | 409 — better |
| Update frequency | Every 32 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 23 MB | 295 MB |
| Age rating | 4+ | 4+ |
| Developer | iENGINEERING Corporation | Bluebeam, Inc. |
Customer experience
Compare Flow
Bluebeam
Bugs and requests
Compare Flow
Not enough reviews yet to summarise bugs or requests.
Bluebeam
Reported bugs
28 issues- 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
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- Keyboard disappears during login
- Selection boundaries too large, preventing precise markup selection
- Apple Pencil input stops working intermittently
- Pen tool produces no line output despite input
- App crashes when opening large file sets
- Session documents fail to load
- Blank PDF pages displayed
- Scaling doesn't work properly
- Blue screen errors
- Markups missing after checkout and checkin
- Incomplete markups syncing between devices
- App freezes during document checkin
- Unable to add users to sessions
- Projects not showing up in app
- App crashes when opening Studio sessions
- Drawings won't load or open
- Markup placement doesn't correspond to tap location
- PDF goes blank when inserting callouts
- Constant logout requiring re-authentication
- Links to details don't work
- App crashes on older iOS versions
- Audio communication issues
- File synchronization failures
Requested features
25 requests- 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
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- Support multiple PDF tabs simultaneously
- Create stamp library with standardized markups
- Add dimension markup capabilities
- Allow local PDF file access and import
- Full Studio session integration
- Improve Apple Pencil responsiveness and precision
- Add eraser tool for pen markups
- Enable photo capture and attachment to markups
- Support Dropbox and cloud storage integration
- Add form field editing capabilities
- Implement punch list and defect tracking
- Add RFI creation functionality
- Support for custom columns and data fields
- Reset viewpoints feature
- Pen width and cloud shape customization
- Settings menu for preferences
- Better pen and drawing mechanics like Notability
- Ability to download session documents to device
- Support for opening PDF attachments from desktop
- Batch file upload capability
In-app purchases
Compare Flow
No in-app purchases
Bluebeam
No in-app purchases
