# A2L Certification Test Prep vs maestrohvacr

The clearest difference is ads: maestrohvacr at none against A2L Certification Test Prep's shown. maestrohvacr also leads on ratings volume (18 vs 3). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. A2L Certification Test Prep sells 1 one-off in-app purchase and maestrohvacr sells 2 in-app purchases, starting at $59.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for A2L Certification Test Prep against 5.0 for maestrohvacr. That said, the two scores are not equally well evidenced: maestrohvacr has 18 ratings behind it against 3, so its average is the more settled of the two.

A2L Certification Test Prep ships an update every 5 days, maestrohvacr every 4 days. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | A2L Certification Test Prep | maestrohvacr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/a2l-certification-test-prep/id6760899340/reviews) | [5.0 (18 ratings)](https://appshunter.io/ios/app/maestrohvacr/id6761862324/reviews) |
| Number of ratings | 3 | **18** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 47 MB | 19 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mike Watson](https://appshunter.io/developer/1848411021) | [Mario Flores](https://appshunter.io/developer/1891818925) |

## 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 |


### maestrohvacr

[App page](https://appshunter.io/ios/app/maestrohvacr/id6761862324)

This app offers comprehensive study materials and tools for HVAC certification, including practice questions, AI tutoring, and field tools for real-time data analysis. It connects with compatible devices for enhanced functionality and provides community features for collaborative learning.

**Highlights:** 3,500+ EPA 608 practice questions, NATE and OSHA certification prep, Bluetooth connectivity with Fieldpiece manifolds, AI-powered Manual J load calculations, 24/7 AI tutor in Spanish and English, Real-time community competitions and study sessions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Maestro HVACR Standard | $59.99 | per month |
| VIP Live Classes | $149.99 | per month |


## Frequently asked questions

### Is A2L Certification Test Prep free?

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

### Is maestrohvacr free?

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

### Which has better reviews, A2L Certification Test Prep or maestrohvacr?

A2L Certification Test Prep and maestrohvacr are both rated 5.0 out of 5 on the App Store, from 3 and 18 ratings respectively.

### Do A2L Certification Test Prep or maestrohvacr have ads?

A2L Certification Test Prep shows ads; maestrohvacr does not.

### Which is updated more often, A2L Certification Test Prep or maestrohvacr?

A2L Certification Test Prep ships an update every 5 days, and maestrohvacr every 4 days. Most recently, A2L Certification Test Prep was updated on October 7, 2026 and maestrohvacr 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.*