# Duct Calculator Elite vs Quietflex Ductulator

The clearest difference is price: Quietflex Ductulator at Free against Duct Calculator Elite's $9.99. Quietflex Ductulator also leads on update cadence (every 3 days vs every 15 months) and rating (5.0 vs 4.8). Duct Calculator Elite's advantage is ratings volume (234 vs 1). On ads, in-app purchases and device support there is nothing between them.

Quietflex Ductulator 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.

Quietflex Ductulator holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Duct Calculator Elite has 234 ratings behind it against 1, so its average is the more settled of the two.

Duct Calculator Elite ships an update every 15 months, Quietflex Ductulator every 3 days. The most recent releases landed on November 1, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | Quietflex Ductulator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (234 ratings)](https://appshunter.io/ios/app/duct-calculator-elite/id665701601/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quietflex-ductulator/id1490925984/reviews)** |
| Number of ratings | **234** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 days** |
| Monetization | Paid | **Free** |
| Size | 13 MB | 30 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [Goodman Manufacturing L.P.](https://appshunter.io/developer/1485904991) |

## 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


### Quietflex Ductulator

[App page](https://appshunter.io/ios/app/quietflex-ductulator/id1490925984)

This utility app helps HVAC professionals and enthusiasts quickly calculate essential airflow metrics for various duct sizes. It provides CFM, FPM, and FL values, simplifying HVAC system design and analysis.

**Highlights:** Calculate CFM, Calculate FPM, Calculate FL, Supports different duct diameters, HVAC system analysis

**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 Quietflex Ductulator free?

Quietflex Ductulator is free to download, with no in-app purchases.

### Which has better reviews, Duct Calculator Elite or Quietflex Ductulator?

Quietflex Ductulator is rated higher. Duct Calculator Elite averages 4.8 out of 5 from 234 ratings, while Quietflex Ductulator averages 5.0 from 1 ratings.

### Do Duct Calculator Elite or Quietflex Ductulator have ads?

Neither Duct Calculator Elite nor Quietflex Ductulator shows ads.

### Which is updated more often, Duct Calculator Elite or Quietflex Ductulator?

Duct Calculator Elite ships an update every 15 months, and Quietflex Ductulator every 3 days. Most recently, Duct Calculator Elite was updated on November 1, 2026 and Quietflex Ductulator on September 26, 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.*