FieldFab vs Snap Draw Iso
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Snap Draw Iso
Create isometric drawings with ease using a crosshair and snap sound for precise line connections. Customize grids, colors, and import/export various formats. Offers advanced features like bitmap brushes and gradient fills for detailed designs.
- Isometric and 2D grids
- Customizable colors
- Import/Export formats
- Fill options (solid, gradient, pattern)
- Large canvas with pan/zoom
- Text and FX options
- Bitmap and vector layer mixing
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Snap Draw Iso makes drawing isometric images a snap. With a crosshair and snap sound effect, you will always be able to connect lines perfect and quickly. Some Features Include: - Traditional square 2-D grid or Isometric grid - Change background color, line colors, and grid colors - Import and Export various formats - Fill fill solid colors, custom gradients, or patterns for the library - Huge Canvas for detailed images with easy pan and zoom touch feature - Text and FX options - Draw with a bitmap brush and mix bitmap layer with vector layor - Zoom to pixel level for fine tuning - Share your drawings on social media or via email - Customizable drawing options
Screenshots
Verdict
The clearest difference is rating: FieldFab at 4.5 against Snap Draw Iso's 3.4. FieldFab also leads on ads (none vs shown) and ratings volume (79 vs 5). Snap Draw Iso's advantage is review sentiment (80% vs 50%) and update cadence (every 3 days vs every 6 weeks). On price, in-app purchases and device support 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.
FieldFab holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: FieldFab has 79 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 50% of FieldFab's written reviews are positive against 80% of Snap Draw Iso's, so the app with the better star average is not the one people write more warmly about.
FieldFab ships an update every 6 weeks, Snap Draw Iso every 3 days. Both last shipped on October 24, 2026.
| Parameter | FieldFab | Snap Draw Iso |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (79 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 50.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 79 — better | 5 |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 16 | 11.0 — better |
| Further details — not scored | ||
| Size | 112 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Robert Sale | andrew bell |
Customer experience
FieldFab
Snap Draw Iso
In-app purchases
FieldFab
No in-app purchases
Snap Draw Iso
No in-app purchases
