# AI Ductulator vs Quietflex Ductulator

The clearest difference is price: Quietflex Ductulator at Free against AI Ductulator's $3.99. Quietflex Ductulator also leads on rating (5.0 vs 3.9) and update cadence (every 3 days vs every 52 months). AI Ductulator's advantage is chart position (#63 vs unranked) and ratings volume (9 vs 1). On ads, in-app purchases and device support there is nothing between them.

Quietflex Ductulator is free to download; AI Ductulator costs $3.99 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 3.9. That said, the two scores are not equally well evidenced: AI Ductulator has 9 ratings behind it against 1, so its average is the more settled of the two.

AI Ductulator ships an update every 52 months, Quietflex Ductulator every 3 days. The most recent releases landed on October 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | AI Ductulator | Quietflex Ductulator |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/ai-ductulator/id986252467/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quietflex-ductulator/id1490925984/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 3 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#63** | — |
| Size | 89 MB | 30 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [pasquale dipaola](https://appshunter.io/developer/986252466) | [Goodman Manufacturing L.P.](https://appshunter.io/developer/1485904991) |

## What reviewers say

### AI Ductulator

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

**Currently charting:** #63 Top Paid · Utilities (US App Store)

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


### 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 AI Ductulator free?

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

### Is Quietflex Ductulator free?

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

### Which has better reviews, AI Ductulator or Quietflex Ductulator?

Quietflex Ductulator is rated higher. AI Ductulator averages 3.9 out of 5 from 9 ratings, while Quietflex Ductulator averages 5.0 from 1 ratings.

### Do AI Ductulator or Quietflex Ductulator have ads?

Neither AI Ductulator nor Quietflex Ductulator shows ads.

### Which is updated more often, AI Ductulator or Quietflex Ductulator?

AI Ductulator ships an update every 52 months, and Quietflex Ductulator every 3 days. Most recently, AI Ductulator was updated on October 13, 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.*