# Peirce Phelps HVAC Pro+ vs Ductulator

The clearest difference is rating: Peirce Phelps HVAC Pro+ at 4.8 against Ductulator's 1.0. Peirce Phelps HVAC Pro+ also leads on ratings volume (54 vs 2). Ductulator's advantage is update cadence (weekly vs every 6 weeks) and monetization model (free vs ad-supported). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Peirce Phelps HVAC Pro+ holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Peirce Phelps HVAC Pro+ has 54 ratings behind it against 2, so its average is the more settled of the two.

Peirce Phelps HVAC Pro+ ships an update every 6 weeks, Ductulator weekly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Peirce Phelps HVAC Pro+ | Ductulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (54 ratings)](https://appshunter.io/ios/app/peirce-phelps-hvac-pro-plus/id1491350039/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/ductulator/id1528030964/reviews) |
| Number of ratings | **54** | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Ad-supported | **Free** |
| Size | 165 MB | 14 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Watsco, Inc.](https://appshunter.io/developer/510378878) | [Simon Leroux](https://appshunter.io/developer/1513421859) |

## What reviewers say

### Peirce Phelps HVAC Pro+

[App page](https://appshunter.io/ios/app/peirce-phelps-hvac-pro-plus/id1491350039)

This app provides HVAC professionals with on-the-go access to product information, real-time availability, and pricing. It includes tools for finding AHRI matched systems, checking warranties, and locating parts, along with helpful calculators and a flashlight feature.

**Highlights:** Real-time product availability and pricing, AHRI matched system search, Warranty verification, Parts lookup and superseded parts, Document access (spec sheets, manuals), Location finder with directions, Duct calculator, QR code and UPC scanner

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

**In-app purchases:** none


### Ductulator

[App page](https://appshunter.io/ios/app/ductulator/id1528030964)

This app provides a simple and efficient tool for calculating the dimensions of square ventilation ducts. It's designed for engineers, architects, and contractors to generate data for mechanical ventilation, cooling, and HVAC projects. Quickly validate residential and commercial solutions with this easy-to-use calculator.

**Highlights:** Calculate equivalent round diameter of square ducts, Convert square duct dimensions by volume ratio, Provide metric equivalence, Validate residential and commercial solutions, Designed for engineers and architects

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peirce Phelps HVAC Pro+ free?

Peirce Phelps HVAC Pro+ is free to download, with no in-app purchases.

### Is Ductulator free?

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

### Which has better reviews, Peirce Phelps HVAC Pro+ or Ductulator?

Peirce Phelps HVAC Pro+ is rated higher. Peirce Phelps HVAC Pro+ averages 4.8 out of 5 from 54 ratings, while Ductulator averages 1.0 from 2 ratings.

### Do Peirce Phelps HVAC Pro+ or Ductulator have ads?

Neither Peirce Phelps HVAC Pro+ nor Ductulator shows ads.

### Which is updated more often, Peirce Phelps HVAC Pro+ or Ductulator?

Peirce Phelps HVAC Pro+ ships an update every 6 weeks, and Ductulator weekly. Most recently, Peirce Phelps HVAC Pro+ was updated on November 3, 2026 and Ductulator on November 3, 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.*