# A2L Certification Test Prep vs House HVAC System 3D Simulator

The clearest difference is price: A2L Certification Test Prep at Free against House HVAC System 3D Simulator's $5.99. House HVAC System 3D Simulator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

A2L Certification Test Prep is free to download; House HVAC System 3D Simulator costs $5.99 up front. A2L Certification Test Prep sells 1 one-off in-app purchase. House HVAC System 3D Simulator asks for nothing beyond the download.

## The numbers

| Metric | A2L Certification Test Prep | House HVAC System 3D Simulator |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/a2l-certification-test-prep/id6760899340/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | — |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#174** |
| Size | 47 MB | 4 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Watson](https://appshunter.io/developer/1848411021) | [Yuhsiu Lai](https://appshunter.io/developer/433114647) |

## What reviewers say

### A2L Certification Test Prep

[App page](https://appshunter.io/ios/app/a2l-certification-test-prep/id6760899340)

This professional tool provides accurate refrigerant charging calculations for next-generation gases like R-454B and R-32. It features error-proof charging, a maximum allowable charge calculator, and offline reference materials for HVAC technicians.

**Highlights:** A2L-ready for R-454B and R-32, Error-proof superheat/subcooling calculations, Integrated Max Allowable Charge Calculator, Branded PDF field reports, Offline P/T charts and safety guides, No account or login required

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A2L SafeCharge Pro | $1.99 | one-time |


### House HVAC System 3D Simulator

[App page](https://appshunter.io/ios/app/house-hvac-system-3d-simulator/id6772185535)

**Currently charting:** #174 Top Paid · Education (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is A2L Certification Test Prep free?

A2L Certification Test Prep is free to download, with in-app purchases available.

### Is House HVAC System 3D Simulator free?

House HVAC System 3D Simulator costs $5.99, with no in-app purchases.

### Do A2L Certification Test Prep or House HVAC System 3D Simulator have ads?

A2L Certification Test Prep shows ads; House HVAC System 3D Simulator does not.

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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.*