# Duct Construction vs Injection Molding Hub

The clearest difference is price: Injection Molding Hub at Free against Duct Construction's $0.99. Injection Molding Hub also leads on update cadence (every 10 days vs every 10 months) and iOS requirement (15.5 vs 17.6). Duct Construction's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

Injection Molding Hub is free to download; Duct Construction costs $0.99 up front. Injection Molding Hub sells 2 one-off in-app purchases. Duct Construction asks for nothing beyond the download.

Duct Construction ships an update every 10 months, Injection Molding Hub every 10 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Duct Construction | Injection Molding Hub |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 10 months | **Every 10 days** |
| Monetization | Paid | — |
| Best chart rank | **#186** | — |
| Size | 1 MB | 101 MB |
| Requires iOS | 17.6 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Muhammad Shahzaib](https://appshunter.io/developer/1803329351) |

## What reviewers say

### Duct Construction

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

**Currently charting:** #186 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


### Injection Molding Hub

[App page](https://appshunter.io/ios/app/injection-molding-hub/id6743525270)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Injection Moulding Pro | $8.99 | one-time |
| Pro Access | $34.99 | one-time |


## Frequently asked questions

### Is Duct Construction free?

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

### Is Injection Molding Hub free?

Injection Molding Hub is free to download, with in-app purchases available.

### Do Duct Construction or Injection Molding Hub have ads?

Injection Molding Hub shows ads; Duct Construction does not.

### Which is updated more often, Duct Construction or Injection Molding Hub?

Duct Construction ships an update every 10 months, and Injection Molding Hub every 10 days. Most recently, Duct Construction was updated on October 27, 2026 and Injection Molding Hub on October 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.*