# Digiduct vs Education Is KEY

The clearest difference is rating: Digiduct at 4.6 against Education Is KEY's 4.0. Digiduct also leads on update cadence (every 2 months vs every 5 months) and ratings volume (11 vs 3). Education Is KEY's advantage is monetization model (free vs ad-supported) and iOS requirement (16.4 vs 26.2). 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.

Digiduct holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 11 and 3 respectively.

Digiduct ships an update every 2 months, Education Is KEY every 5 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Digiduct | Education Is KEY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (11 ratings)](https://appshunter.io/ios/app/digiduct/id6738926359/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/education-is-key/id6744249929/reviews) |
| Number of ratings | **11** | 3 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Ad-supported | **Free** |
| Size | 4 MB | 63 MB |
| Requires iOS | 26.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Syska Hennessy Group](https://appshunter.io/developer/1782943081) | [KFH Industries, INC](https://appshunter.io/developer/1806664179) |

## What reviewers say

### Digiduct

[App page](https://appshunter.io/ios/app/digiduct/id6738926359)

This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

**Highlights:** Duct sizing for rectangular, round, and flat oval ducts, Customizable dimensions with locked values, Duct location intelligence for context-aware sizing, Calculations based on CFM, pressure drop, or velocity, Alerts for exceeding pressure drop or velocity limits

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

**In-app purchases:** none


### Education Is KEY

[App page](https://appshunter.io/ios/app/education-is-key/id6744249929)

This tool provides firefighters with essential hose data and calculations, including friction loss, GPM, and nozzle pressure. It also serves as a product catalog for hose specifications and helps locate local product experts.

**Highlights:** Friction loss calculator, GPM and nozzle pressure reference, Key Hose product catalog, Local product expert finder, Fire service interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Digiduct free?

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

### Is Education Is KEY free?

Education Is KEY is free to download, with no in-app purchases.

### Which has better reviews, Digiduct or Education Is KEY?

Digiduct is rated higher. Digiduct averages 4.6 out of 5 from 11 ratings, while Education Is KEY averages 4.0 from 3 ratings.

### Do Digiduct or Education Is KEY have ads?

Neither Digiduct nor Education Is KEY shows ads.

### Which is updated more often, Digiduct or Education Is KEY?

Digiduct ships an update every 2 months, and Education Is KEY every 5 months. Most recently, Digiduct was updated on October 24, 2026 and Education Is KEY on October 10, 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.*