# HVACsim vs Education Is KEY

The clearest difference is rating: Education Is KEY at 4.0 against HVACsim's 2.6. Education Is KEY also leads on in-app purchases (none vs 1). HVACsim's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (10 vs 3). On price, ads and device support there is nothing between them.

Both are free to download. HVACsim sells 1 one-off in-app purchase. Education Is KEY asks for nothing beyond the download.

Education Is KEY holds the better App Store score, 4.0 against 2.6. Both are backed by a comparable volume of ratings — 10 and 3 respectively.

HVACsim ships an update every 2 months, Education Is KEY every 5 months. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | HVACsim | Education Is KEY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (10 ratings)](https://appshunter.io/ios/app/hvacsim/id6740935191/reviews) | **[4.0 (3 ratings)](https://appshunter.io/ios/app/education-is-key/id6744249929/reviews)** |
| Number of ratings | **10** | 3 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 63 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nauman Innovation Group LLC](https://appshunter.io/developer/1764933586) | [KFH Industries, INC](https://appshunter.io/developer/1806664179) |

## What reviewers say

### HVACsim

[App page](https://appshunter.io/ios/app/hvacsim/id6740935191)

This app offers interactive learning and real-world data analysis to help HVAC professionals diagnose and troubleshoot systems. It provides personalized training plans, skill assessments, and team management tools for contractors.

**Highlights:** Technical Knowledge Evaluator, Individualized Learning Plans, Real-World Data Analysis, Team Management Tools, Continuous Learning Library

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $29.99 | one-time |


### 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 HVACsim free?

HVACsim is free to download, with in-app purchases available.

### Is Education Is KEY free?

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

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

Education Is KEY is rated higher. HVACsim averages 2.6 out of 5 from 10 ratings, while Education Is KEY averages 4.0 from 3 ratings.

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

Neither HVACsim nor Education Is KEY shows ads.

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

HVACsim ships an update every 2 months, and Education Is KEY every 5 months. Most recently, HVACsim was updated on September 20, 2026 and Education Is KEY on September 24, 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.*