# AI Ductulator vs ComfortStar Tech Support

AI Ductulator and ComfortStar Tech Support both sit at 3.9 stars, but that hides the real split: 100% of ComfortStar Tech Support's written reviews are positive against 43% of AI Ductulator's. ComfortStar Tech Support also leads on price (Free vs $3.99) and update cadence (monthly vs every 52 months). On rating, ratings volume, ads and in-app purchases there is nothing between them.

ComfortStar Tech Support is free to download; AI Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 3.9 for AI Ductulator against 4.0 for ComfortStar Tech Support. Both are backed by a comparable volume of ratings — 9 and 5 respectively. Written reviews are what separate them: 43% of AI Ductulator's written reviews are positive against 100% of ComfortStar Tech Support's.

AI Ductulator ships an update every 52 months, ComfortStar Tech Support monthly. The most recent releases landed on October 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | AI Ductulator | ComfortStar Tech Support |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/ai-ductulator/id986252467/reviews) | **[4.0 (5 ratings)](https://appshunter.io/ios/app/comfortstar-tech-support/id6448704531/reviews)** |
| Number of ratings | **9** | 5 |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 52 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 89 MB | 38 MB |
| Requires iOS | **13.0** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [pasquale dipaola](https://appshunter.io/developer/986252466) | [EAir LLC](https://appshunter.io/developer/1078519512) |

## 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


### ComfortStar Tech Support

[App page](https://appshunter.io/ios/app/comfortstar-tech-support/id6448704531)

An interactive guide for HVAC technicians, offering access to manuals, troubleshooting guides, and direct communication with support agents. Streamline unit repair and create detailed service reports for future reference.

**Highlights:** Access owner and installation manuals, Service manuals and submittals, Create and send detailed service reports, Troubleshooting guides and videos, Error code guides, Direct communication with support agents

**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 ComfortStar Tech Support free?

ComfortStar Tech Support is free to download, with no in-app purchases.

### Which has better reviews, AI Ductulator or ComfortStar Tech Support?

ComfortStar Tech Support is rated higher. AI Ductulator averages 3.9 out of 5 from 9 ratings, while ComfortStar Tech Support averages 4.0 from 5 ratings.

### Do AI Ductulator or ComfortStar Tech Support have ads?

Neither AI Ductulator nor ComfortStar Tech Support shows ads.

### Which is updated more often, AI Ductulator or ComfortStar Tech Support?

AI Ductulator ships an update every 52 months, and ComfortStar Tech Support monthly. Most recently, AI Ductulator was updated on October 21, 2026 and ComfortStar Tech Support on October 2, 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.*