龙嘉SCM供应商 vs Duct Calculator Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
龙嘉SCM供应商
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移动办公，提高效率！
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
Screenshots
Verdict
The clearest difference is price: 龙嘉SCM供应商 at Free against Duct Calculator Pro's $3.99. 龙嘉SCM供应商 also leads on update cadence (every 4 months vs every 72 months) and iOS requirement (12.0 vs 18.5). On ads, 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
龙嘉SCM供应商 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.
龙嘉SCM供应商 ships an update every 4 months, Duct Calculator Pro every 72 months. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.
| Parameter | 龙嘉SCM供应商 | Duct Calculator Pro |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months — better | Every 72 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 35 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | 文朗 梁 | Imran Pinjara |
In-app purchases
龙嘉SCM供应商
No in-app purchases
Duct Calculator Pro
No in-app purchases
Questions
Is 龙嘉SCM供应商 free?
Is Duct Calculator Pro free?
Do 龙嘉SCM供应商 or Duct Calculator Pro have ads?
Which is updated more often, 龙嘉SCM供应商 or Duct Calculator Pro?
Other comparisons
