# HVAC Toolkit Ultimate vs Duct Construction

The clearest difference is price: Duct Construction at $0.99 against HVAC Toolkit Ultimate's $59.99. HVAC Toolkit Ultimate's advantage is rating (3.0 vs 1.0) and review sentiment (40% vs 0%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

HVAC Toolkit Ultimate costs $59.99 and Duct Construction $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HVAC Toolkit Ultimate holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 40% of HVAC Toolkit Ultimate's written reviews are positive against 0% of Duct Construction's.

HVAC Toolkit Ultimate ships an update every 6 months, Duct Construction every 10 months. The most recent releases landed on October 12, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | HVAC Toolkit Ultimate | Duct Construction |
| --- | --- | --- |
| Price | $59.99 | **$0.99** |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/duct-construction/id6443518338/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 10 months |
| Monetization | Paid | Paid |
| Size | 59 MB | 1 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Wassim Murr](https://appshunter.io/developer/1474939474) |

## What reviewers say

### HVAC Toolkit Ultimate

[App page](https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247)

This comprehensive application offers a suite of tools for HVAC professionals, including load calculations, equipment tracking, refrigerant charts, duct and pipe sizing, and psychrometric analysis. It consolidates multiple functionalities into a single, powerful utility for field and office use.

**Highlights:** Residential load calculations, Equipment nameplate data tracking, Refrigerant pressure-temperature charts, Superheat and subcool calculations, Duct and pipe sizing analysis, Psychrometric calculations, Steam table property calculations

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

**In-app purchases:** none


### Duct Construction

[App page](https://appshunter.io/ios/app/duct-construction/id6443518338)

This app helps determine duct construction and reinforcement options based on duct size and system pressure class. It provides condensed lists of suitable options, saving time spent on manual calculations and table lookups. Results are based on industry standards for galvanized steel duct sheets.

**Highlights:** Duct size range from 2" to 120", Pressure classes up to 4 in.wg, Calculates duct weights per linear foot, Determines required duct gauge and reinforcement spacing, Clear illustrations for reinforcement types, Simple and effective UI design

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Toolkit Ultimate free?

HVAC Toolkit Ultimate costs $59.99, with no in-app purchases.

### Is Duct Construction free?

Duct Construction costs $0.99, with no in-app purchases.

### Which has better reviews, HVAC Toolkit Ultimate or Duct Construction?

HVAC Toolkit Ultimate is rated higher. HVAC Toolkit Ultimate averages 3.0 out of 5 from 4 ratings, while Duct Construction averages 1.0 from 1 ratings.

### Do HVAC Toolkit Ultimate or Duct Construction have ads?

Neither HVAC Toolkit Ultimate nor Duct Construction shows ads.

### Which is updated more often, HVAC Toolkit Ultimate or Duct Construction?

HVAC Toolkit Ultimate ships an update every 6 months, and Duct Construction every 10 months. Most recently, HVAC Toolkit Ultimate was updated on October 12, 2026 and Duct Construction on September 25, 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.*