# AI Ductulator vs Duct Calculator

The clearest difference is price: AI Ductulator at $3.99 against Duct Calculator's $19.99. AI Ductulator also leads on iOS requirement (13.0 vs 15.0). Duct Calculator's advantage is rating (4.5 vs 3.9) and update cadence (every 2 months vs every 52 months). On ads, in-app purchases and device support there is nothing between them.

AI Ductulator costs $3.99 and Duct Calculator $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Duct Calculator holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: Duct Calculator has 189 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 43% of AI Ductulator's written reviews are positive against 57% of Duct Calculator's.

AI Ductulator ships an update every 52 months, Duct Calculator every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | AI Ductulator | Duct Calculator |
| --- | --- | --- |
| Price | **$3.99** | $19.99 |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/ai-ductulator/id986252467/reviews) | **[4.5 (189 ratings)](https://appshunter.io/ios/app/duct-calculator/id1078238132/reviews)** |
| Number of ratings | 9 | **189** |
| Positive reviews | 42.9% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 89 MB | 2 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [pasquale dipaola](https://appshunter.io/developer/986252466) | [Pheinex, LLC](https://appshunter.io/developer/996932317) |

## What reviewers say

### AI Ductulator

[App page](https://appshunter.io/ios/app/ai-ductulator/id986252467)

This application serves as a duct sizing calculator for HVAC professionals and enthusiasts. It provides quick and accurate calculations for duct dimensions based on various parameters.

**Highlights:** Duct sizing calculations, HVAC parameter input, Accurate dimension results, User-friendly interface

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

**In-app purchases:** none


### Duct Calculator

[App page](https://appshunter.io/ios/app/duct-calculator/id1078238132)

This app allows HVAC professionals to quickly and accurately size new ducts or calculate the performance of existing ones. It supports both round and rectangular ductwork, offering precise calculations through direct entry or intuitive sliders. The tool provides live updates and outputs key performance metrics.

**Highlights:** Size round and rectangular ductwork, Adjust airflow, diameter, width, and height, Direct number entry for precision, Lockable dimensions for 'what-if' scenarios, Live update of calculated values, Outputs velocity and pressure drop, Supports IP and SI units

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AI Ductulator free?

AI Ductulator costs $3.99, with no in-app purchases.

### Is Duct Calculator free?

Duct Calculator costs $19.99, with no in-app purchases.

### Which has better reviews, AI Ductulator or Duct Calculator?

Duct Calculator is rated higher. AI Ductulator averages 3.9 out of 5 from 9 ratings, while Duct Calculator averages 4.5 from 189 ratings.

### Do AI Ductulator or Duct Calculator have ads?

Neither AI Ductulator nor Duct Calculator shows ads.

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

AI Ductulator ships an update every 52 months, and Duct Calculator every 2 months. Most recently, AI Ductulator was updated on November 1, 2026 and Duct Calculator on November 2, 2026.

---

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