Duct Calculator Pro vs WPG IntelliGrip
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duct Calculator Pro
This tool assists HVAC professionals and students with quick and precise calculations for duct sizing, airflow velocity, and airflow rate. It works offline and features a user-friendly interface for efficient project work.
- Duct size calculation
- Airflow velocity (FPM) calculation
- Airflow rate (CFM) calculation
- Rectangular and round duct support
- Offline functionality
- Ad-free experience
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Duct Calculator is a simple, fast, and accurate tool designed for HVAC engineers, designers, technicians, and students. This app helps you calculate duct size, airflow velocity (FPM), and airflow rate (CFM) for both rectangular and round ducts with ease. Whether you are working on Heating, Ventilation, or Air Conditioning projects, this app provides quick calculations without requiring internet access. Key Features • No Internet Required – Works completely offline. • No Irritating Ads – Clean and smooth user experience. • Fast & Accurate Calculations – Built for HVAC professionals. • User-Friendly Interface – Simple layout for quick results. Available Calculators Duct Size Calculator Enter airflow rate (CFM) and airflow velocity (FPM) to get recommended rectangular and round duct sizes in inches. CFM Calculator Enter duct dimensions (length, width, or diameter in inches) and airflow velocity (FPM) to calculate airflow rate (CFM). FPM Calculator Enter duct size and airflow rate (CFM) to calculate airflow velocity (FPM). Who Should Use This App? Perfect for: • HVAC Engineers • Designers & Fabricators • Site Technicians • Students learning HVAC fundamentals
WPG IntelliGrip
Monitor the status, battery, vacuum levels, and performance of your DC3 Intelli-Grip lifters. Track maintenance records and access key metrics directly from your iOS device.
- Lifter status monitoring
- Battery strength display
- Vacuum level tracking
- Performance metrics
- Maintenance records
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All DC3 Intelli-Grip lifters equipped with version 7.0 or later software is compatible with the WPG IntelliGrip app. It allows monitoring the lifter status, battery strength, vacuum levels, performance metrics, maintenance records, and much more from your iOS device.
Screenshots
Verdict
The clearest difference is price: WPG IntelliGrip at Free against Duct Calculator Pro's $3.99. WPG IntelliGrip also leads on rating (5.0 vs 1.0) and update cadence (every 4 months vs every 72 months). Duct Calculator Pro's advantage is ads (none vs shown). On ratings volume, 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
WPG IntelliGrip is free to download; Duct Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WPG IntelliGrip holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Duct Calculator Pro ships an update every 72 months, WPG IntelliGrip every 4 months. Both last shipped on November 3, 2026.
| Parameter | Duct Calculator Pro | WPG IntelliGrip |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 72 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Imran Pinjara | WOOD'S POWR-GRIP CO., INC. |
In-app purchases
Duct Calculator Pro
No in-app purchases
WPG IntelliGrip
No in-app purchases
Questions
Is Duct Calculator Pro free?
Is WPG IntelliGrip free?
Which has better reviews, Duct Calculator Pro or WPG IntelliGrip?
Do Duct Calculator Pro or WPG IntelliGrip have ads?
Which is updated more often, Duct Calculator Pro or WPG IntelliGrip?
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