Proof TAB vs SMACNA Duct
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Proof TAB
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Proof TAB brings HVAC testing, adjusting, balancing, and commissioning work to your iPhone and iPad. Record equipment readings on site and coordinate project data with the Proof desktop companion. FIELD DATA, ORGANIZED Keep test information together by project and equipment. Record readings in structured forms and use checklists and issue logs to document your site work. BUILT FOR HVAC TEAMS Work with air handling units, fans, packaged units, chillers, hydronic systems, VAV equipment, duct traverses, and air distribution tests. FROM SITE TO OFFICE Save your work locally and synchronize through your company's Proof workflow. Continue project review and reporting with the desktop companion. LESS RE-ENTRY Use equipment-specific forms and calculations to keep field records consistent and reduce repeated data entry. Proof TAB is part of the Proof CxTAB platform. Company account access and the desktop companion may be required for your workflow. Visit proofcxtab.com to learn more or request a demonstration.
SMACNA Duct
This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.
- Rectangular, round, and oval duct sizing
- Real-time calculation updates
- Converts duct shapes and sizes
- Calculates friction loss
- Determines sizes for given velocity
- User-friendly interface
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The SMACNA Duct-U-Lator is a digital version of the classic duct sizing tool. It is used by HVAC professionals to quickly size rectangular, round, and oval ducts for optimal air flow in ventilation systems. The app simplifies the calculation process, helping users determine duct dimensions based on variables like air volume (CFM), friction loss, and air velocity. Key features include: - **User-friendly Interface**: The app offers a simple, intuitive design that mimics the physical ductulator, allowing for quick inputs and results. - **Multiple Duct Types**: Supports rectangular, round, and oval duct sizing, giving flexibility in various design scenarios. - **Real-time Calculations**: As users adjust inputs, the app instantly updates results, speeding up the design process. - **Enhanced Accuracy**: By automating complex calculations, the app reduces human error and ensures more accurate results compared to manual methods. This app works as a Duct-U-Lator and Pressure Loss (friction) calculator which has the following functions. Converts Duct Shape or Size to Another Determines Sizes for a Given Friction Rate Determines Sizes for a Given Velocity Determines Sizes for a Given Velocity and a Friction Loss Rate (simultaneous output) Determines the Airflow Rate for a Given Size and Friction Loss Rate Calculates Friction Loss The SMACNA iOS Duct-U-Lator is a valuable tool for HVAC engineers, contractors, and technicians looking for a portable and efficient way to perform duct sizing on-site. It combines the convenience of modern technology with SMACNA's trusted guidelines for air distribution system design.
Screenshots
Verdict
Proof TAB and SMACNA Duct are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Proof TAB | SMACNA Duct |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 948 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Jawad Jaber | SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC. |
In-app purchases
Proof TAB
No in-app purchases
SMACNA Duct
No in-app purchases








