Comparison

Cumulus vs FieldFab

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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

About

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.

Highlights
  • Augmented reality visualization
  • Ductwork transition design
  • Field measurements input
  • Sheet metal cutting optimization
  • Sharing and PDF export
  • Open source
Features
Read full description

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

Cumulus4 screens
FieldFab4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Cumulus versus FieldFab: the parameters behind the verdict, then further details
ParameterCumulusFieldFab
PriceFreeFree
Rating5.0 (3 ratings) — better4.5 (79 ratings)
Positive reviews—50.0% of reviews
Number of ratings379 — better
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better16
Further details — not scored
Size46 MB112 MB
Age rating4+4+
DeveloperArrowstreet, Inc.Robert Sale

Customer experience

Cumulus

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

FieldFab

All ratings65 ratings
Positive84.6%
Neutral4.6%
Negative10.8%
Written reviews8 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Cumulus

No in-app purchases

None

FieldFab

No in-app purchases

Questions

Is Cumulus free?
Cumulus is free to download, with no in-app purchases.
Is FieldFab free?
FieldFab is free to download, with no in-app purchases.
Which has better reviews, Cumulus or FieldFab?
Cumulus is rated higher. Cumulus averages 5.0 out of 5 from 3 ratings, while FieldFab averages 4.5 from 79 ratings.
Do Cumulus or FieldFab have ads?
Neither Cumulus nor FieldFab shows ads.
Which is updated more often, Cumulus or FieldFab?
Cumulus ships an update every 3 months, and FieldFab every 6 weeks. Most recently, Cumulus was updated on October 19, 2026 and FieldFab on October 24, 2026.

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