# Duct Calculator Elite vs 龙嘉SCM供应商

The clearest difference is price: 龙嘉SCM供应商 at Free against Duct Calculator Elite's $9.99. 龙嘉SCM供应商 also leads on update cadence (every 4 months vs every 15 months) and iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

龙嘉SCM供应商 is free to download; Duct Calculator Elite costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Duct Calculator Elite ships an update every 15 months, 龙嘉SCM供应商 every 4 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | 龙嘉SCM供应商 |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (234 ratings)](https://appshunter.io/ios/app/duct-calculator-elite/id665701601/reviews)** | — |
| Number of ratings | **234** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Paid | — |
| Size | 13 MB | 35 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [文朗 梁](https://appshunter.io/developer/1293631579) |

## What reviewers say

### Duct Calculator Elite

[App page](https://appshunter.io/ios/app/duct-calculator-elite/id665701601)

This app simplifies HVAC duct sizing calculations. It computes duct size, velocity, pressure drop, and flow rate with an intuitive interface. Supports various units and duct materials for precise HVAC design.

**Highlights:** Calculate duct size, velocity, pressure drop, flow rate, Duct Size by Airflow mode, Duct Size by Dimension mode, Pressure Drop calculations, Customizable units and duct materials, Uses ASHRAE Handbook friction loss equations

**Features:** macOS Compatibility

**In-app purchases:** none


### 龙嘉SCM供应商

[App page](https://appshunter.io/ios/app/scm/id1459545200)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duct Calculator Elite free?

Duct Calculator Elite costs $9.99, with no in-app purchases.

### Is 龙嘉SCM供应商 free?

龙嘉SCM供应商 is free to download, with no in-app purchases.

### Do Duct Calculator Elite or 龙嘉SCM供应商 have ads?

Neither Duct Calculator Elite nor 龙嘉SCM供应商 shows ads.

### Which is updated more often, Duct Calculator Elite or 龙嘉SCM供应商?

Duct Calculator Elite ships an update every 15 months, and 龙嘉SCM供应商 every 4 months. Most recently, Duct Calculator Elite was updated on November 1, 2026 and 龙嘉SCM供应商 on October 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*