# Duct Calculator Elite vs MasterBuilder Pro

The clearest difference is price: MasterBuilder Pro at Free against Duct Calculator Elite's $9.99. MasterBuilder Pro also leads on update cadence (every 2 months vs every 15 months). Duct Calculator Elite's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

MasterBuilder Pro is free to download; Duct Calculator Elite costs $9.99 up front. MasterBuilder Pro sells 3 in-app purchases, starting at $9.00 per month. Duct Calculator Elite asks for nothing beyond the download.

Duct Calculator Elite ships an update every 15 months, MasterBuilder Pro every 2 months. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | MasterBuilder Pro |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (232 ratings)](https://appshunter.io/ios/app/duct-calculator-elite/id665701601/reviews)** | — |
| Number of ratings | **232** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 13 MB | 34 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [Harrison Habib](https://appshunter.io/developer/1883474674) |

## 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


### MasterBuilder Pro

[App page](https://appshunter.io/ios/app/masterbuilder-pro/id6760252415)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MasterBuilder Pro Monthly | $9.00 | per month |
| Annual | $89.99 | per year |
| Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is Duct Calculator Elite free?

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

### Is MasterBuilder Pro free?

MasterBuilder Pro is free to download, with in-app purchases available.

### Do Duct Calculator Elite or MasterBuilder Pro have ads?

Neither Duct Calculator Elite nor MasterBuilder Pro shows ads.

### Which is updated more often, Duct Calculator Elite or MasterBuilder Pro?

Duct Calculator Elite ships an update every 15 months, and MasterBuilder Pro every 2 months. Most recently, Duct Calculator Elite was updated on October 11, 2026 and MasterBuilder Pro on September 30, 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.*