# Duct Construction vs Contractor Estimate Pro

The clearest difference is price: Contractor Estimate Pro at Free against Duct Construction's $0.99. Contractor Estimate Pro also leads on update cadence (every 2 months vs every 10 months) and iOS requirement (15.1 vs 17.6). Duct Construction's advantage is in-app purchases (none vs 1) and chart position (#140 vs unranked). On ads and device support there is nothing between them.

Contractor Estimate Pro is free to download; Duct Construction costs $0.99 up front. Contractor Estimate Pro sells 1 in-app purchase, starting at $4.99 per month. Duct Construction asks for nothing beyond the download.

Duct Construction ships an update every 10 months, Contractor Estimate Pro every 2 months. The most recent releases landed on September 25, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Duct Construction | Contractor Estimate Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/duct-construction/id6443518338/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Paid | — |
| Best chart rank | **#140** | — |
| Size | 1 MB | 38 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Linesite Tech](https://appshunter.io/developer/1879873664) |

## What reviewers say

### Duct Construction

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

**Currently charting:** #140 Top Paid · Productivity (US App Store)

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


### Contractor Estimate Pro

[App page](https://appshunter.io/ios/app/contractor-estimate-pro/id6759828892)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contractor Estimate Pro (Monthly) | $4.99 | per month |


## Frequently asked questions

### Is Duct Construction free?

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

### Is Contractor Estimate Pro free?

Contractor Estimate Pro is free to download, with in-app purchases available.

### Do Duct Construction or Contractor Estimate Pro have ads?

Neither Duct Construction nor Contractor Estimate Pro shows ads.

### Which is updated more often, Duct Construction or Contractor Estimate Pro?

Duct Construction ships an update every 10 months, and Contractor Estimate Pro every 2 months. Most recently, Duct Construction was updated on September 25, 2026 and Contractor Estimate Pro on September 13, 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.*