# Ductulate HD vs DuctPro

The clearest difference is price: DuctPro at Free against Ductulate HD's $7.99. DuctPro also leads on update cadence (weekly vs every 4 months). Ductulate HD's advantage is iOS requirement (9.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

DuctPro is free to download; Ductulate HD costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ductulate HD ships an update every 4 months, DuctPro weekly. The most recent releases landed on October 6, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Ductulate HD | DuctPro |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.9 (23 ratings)](https://appshunter.io/ios/app/ductulate-hd/id441054001/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 92.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | — |
| Size | 33 MB | 3 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Steven Ramsay](https://appshunter.io/developer/415008343) | [High Intent Labs](https://appshunter.io/developer/6771761657) |

## What reviewers say

### Ductulate HD

[App page](https://appshunter.io/ios/app/ductulate-hd/id441054001)

This app helps HVAC engineers quickly calculate duct size, air volume, pressure loss, and velocity. It supports both imperial and metric units and offers features like scroll lock and customizable themes.

**Highlights:** Calculate duct size, air volume, pressure loss, velocity, Supports imperial and metric units, Scroll Lock for accidental touch prevention, Typical velocity reference chart, Customizable themes and company logo support, Favorite measurement markers

**Features:** macOS Compatibility

**In-app purchases:** none


### DuctPro

[App page](https://appshunter.io/ios/app/ductpro/id6771761655)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ductulate HD free?

Ductulate HD costs $7.99, with no in-app purchases.

### Is DuctPro free?

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

### Do Ductulate HD or DuctPro have ads?

Neither Ductulate HD nor DuctPro shows ads.

### Which is updated more often, Ductulate HD or DuctPro?

Ductulate HD ships an update every 4 months, and DuctPro weekly. Most recently, Ductulate HD was updated on October 6, 2026 and DuctPro on September 19, 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.*