Cumulus vs FieldFab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cumulus
Visualize and interact with 3D architectural models on your mobile device. Explore designs, view documents, and create sketches to share with your project team. Augmented reality mode allows for close-up inspection of detailed models.
- View, rotate, and explore 3D models
- Save and share 3D views
- Access project documents and plans
- View project renderings
- Create and share sketches
- Augmented reality mode for detailed inspection
- Manage project team members and permissions
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Used by architects, their clients, consultants, contractors and community stakeholders, Cumulus brings design visualization and engagement to your fingertips. Use the Cumulus: Project Understanding app to: • View, Rotate, and Explore projects' 3D models • Save new 3D views and share instantly with the project team • View a project's documents, plans, and elevations on the fly • View a project's renderings to understand the creative design intent • Create sketches and share instantly with the project team • Toggle AR mode to view a table-top model and inspect details up-close • Manage the project team: add/remove users and assign permissions
FieldFab
This app helps HVAC installers create precise ductwork transitions in the field using augmented reality. It streamlines the process of measuring, designing, and visualizing complex ductwork before cutting any materials, saving time and reducing errors.
- Augmented reality visualization
- Ductwork transition design
- Field measurements input
- Sheet metal cutting optimization
- Sharing and PDF export
- Open source
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This software allows HVAC installers, primarily retrofitters, to build the very best ductwork transitions they possibly can while in the field. Doing ductwork transitions by hand can be a tedious and labor intensive process, but is very often necessary in order to achieve good airflow. When you cut each piece you have to keep track of which side will have tabs, how long the tabs are, and sometimes even if you do it right you end up with gaps or noticeably crooked faces. If you've ever found yourself building a transition in the attic of a three story house then you will absolutely love Field Fab. Now you can take your measurements, input them into Field Fab, and you can then view the results via Augmented Reality using your iPhone or iPad's camera before even cutting a single piece of sheet metal! This saves you trips back and forth to the van and saves you the hassle of bringing a large piece of sheet metal into the attic. Sometimes it's nice to have the transition ordered at your nearest sheet metal fabricator to have delivered before install day. Well with Field Fab, your sales crew can take the measurements and view them before an installer even shows up. Field Fab includes a sharing feature that allows other people to view the transition you made in FieldFab by sharing a link, which means it works over text message and email. No attachments! If you would like attachments, FieldFab also has the option to export to PDF. FieldFab is open source and available on GitHub for anybody to download. https://github.com/robertmsale/FieldFab
Screenshots
Verdict
The clearest difference is rating: Cumulus at 5.0 against FieldFab's 4.5. FieldFab's advantage is ratings volume (79 vs 3) and update cadence (every 6 weeks vs every 3 months). 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.
Cumulus holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: FieldFab has 79 ratings behind it against 3, so its average is the more settled of the two.
Cumulus ships an update every 3 months, FieldFab every 6 weeks. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.
| Parameter | Cumulus | FieldFab |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 4.5 (79 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 3 | 79 — better |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 16 |
| Further details — not scored | ||
| Size | 46 MB | 112 MB |
| Age rating | 4+ | 4+ |
| Developer | Arrowstreet, Inc. | Robert Sale |
Customer experience
Cumulus
FieldFab
In-app purchases
Cumulus
No in-app purchases
FieldFab
No in-app purchases









