# Duct Calculator Elite vs XAMControl.Web

The clearest difference is price: XAMControl.Web at Free against Duct Calculator Elite's $9.99. XAMControl.Web also leads on iOS requirement (12.0 vs 15.6). Duct Calculator Elite's advantage is update cadence (every 15 months vs every 53 months) and chart position (#147 vs unranked). On ads, in-app purchases and device support there is nothing between them.

XAMControl.Web 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, XAMControl.Web every 53 months. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | XAMControl.Web |
| --- | --- | --- |
| 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 53 months |
| Monetization | Paid | — |
| Best chart rank | **#147** | — |
| Size | 13 MB | 38 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [evon GmbH](https://appshunter.io/developer/930823722) |

## What reviewers say

### Duct Calculator Elite

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

**Currently charting:** #147 Top Paid · Utilities (US App Store)

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


### XAMControl.Web

[App page](https://appshunter.io/ios/app/xamcontrolweb/id1200464722)

**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 XAMControl.Web free?

XAMControl.Web is free to download, with no in-app purchases.

### Do Duct Calculator Elite or XAMControl.Web have ads?

Neither Duct Calculator Elite nor XAMControl.Web shows ads.

### Which is updated more often, Duct Calculator Elite or XAMControl.Web?

Duct Calculator Elite ships an update every 15 months, and XAMControl.Web every 53 months. Most recently, Duct Calculator Elite was updated on October 23, 2026 and XAMControl.Web on October 12, 2026.

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