DALC vs Trimble® FabShop Mobile Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DALC
This tool helps engineers, architects, designers, and contractors accurately estimate air leakage from ductwork. It simplifies determining pass/fail for duct air leakage tests and allows combining multiple duct sections for total leakage calculations, adhering to industry standards.
- Estimate ductwork air leakage
- Determine DALT pass/fail
- Combine multiple duct sections
- Calculate total allowable leakage
- Provides suggested leakage classes
- Compliant with industry standards
Read full descriptionHide full description
This simple to use but effective application is provided by the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA). This tool allows engineers, architects, designers, and contractors to easily and accurately estimate the leakage of air from ductwork. It also allows a quick and easy way to determine the pass/fail mark for properly specified Duct Air Leakage Tests (DALT). Users can combine multiple sections of ductwork that vary by size and shape to calculate a total allowable leakage. The application uses the method outlined in SMACNA’s HVAC Air Duct Leakage Manual, and provides suggested leakage classes from SMACNA’s latest edition of the manual. The method used is compliant with ASHRAE 90.1, IECC, IGCC Version 2, IMC and the UMC.
Trimble® FabShop Mobile Pro
This app brings powerful HVAC duct fitting design capabilities to your tablet. Accurately enter fitting dimensions and preview them in 3D on-site, minimizing errors and rework. Streamline the transfer of field requests to your shop for increased project profitability.
- Comprehensive HVAC duct fitting library
- 3D rotational preview of fittings
- Field verification of fittings
- Faster transfer of field requests
- Reduced fitting waste and rework
- Support for multiple shop configurations
Read full descriptionHide full description
Trimble FabShop Mobile Pro extends the power of your Trimble FabShop CAM software to your favorite tablet. With the same comprehensive HVAC duct fitting library as Trimble FabShop, this app allows you enter fitting dimensions and preview in 3D while on the jobsite, reducing the re-work associated with mismanaged or miscalculated hand written notes. Benefits: • Faster transfer of field fitting requests to your shop • Greater accuracy of fitting detail collected in the field • Increase project profit by reducing incorrect fitting waste • Field verify fittings by sending them from the shop to the mobile app Features: • Comprehensive library of fittings from residential to the largest industrial applications • Standard company defaults and fittings from your Trimble FabShop CAM software to your tablet • Consistent intuitive input screens from Trimble FabShop to Trimble® Field Fitting Input • See the dimensional data entered in a 3-D rotational preview taking all the guesswork out of what you expect to receive • Easily see all entered fittings through graphical icons, piece numbers and dimensional data • Notes section allows you to add instructions for the shop and field to assist in the fabrication and installation process • Supports Automatic input methods to speed up fitting entry • Supports shop data configurations from multiple sources. Import configurations from multiple shops or have different configurations for different project types? Not a problem with Trimble FabShop Mobile Pro! NOTE: While this app is free, importing the fitting job into Trimble FabShop does require a FabShop subscription license or a valid software support agreement. Please contact mepsupport@trimble.com for more information.
Screenshots
Verdict
The clearest difference is update cadence: DALC at every 2 weeks against Trimble® FabShop Mobile Pro's every 3 months. DALC also leads on review sentiment (15% vs 0%) and iOS requirement (6.0 vs 11.0). 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.
DALC ships an update every 2 weeks, Trimble® FabShop Mobile Pro every 3 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.
| Parameter | DALC | Trimble® FabShop Mobile Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (27 ratings) — better | — |
| Positive reviews | 14.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 27 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 10 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC. | Trimble Inc. |
Customer experience
DALC
Trimble® FabShop Mobile Pro
In-app purchases
DALC
No in-app purchases
Trimble® FabShop Mobile Pro
No in-app purchases








