# Cumulus vs FieldFab

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.

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.

## The numbers

| Metric | Cumulus | FieldFab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cumulus-project-understanding/id1503410868/reviews)** | [4.5 (79 ratings)](https://appshunter.io/ios/app/fieldfab/id1533610600/reviews) |
| Number of ratings | 3 | **79** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 46 MB | 112 MB |
| Requires iOS | **15.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arrowstreet, Inc.](https://appshunter.io/developer/1384580121) | [Robert Sale](https://appshunter.io/developer/1533610602) |

## What reviewers say

### Cumulus

[App page](https://appshunter.io/ios/app/cumulus-project-understanding/id1503410868)

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

**In-app purchases:** none


### FieldFab

[App page](https://appshunter.io/ios/app/fieldfab/id1533610600)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*