# AC  Service Tech LLC vs A2L Certification Test Prep

The clearest difference is in-app purchases: AC  Service Tech LLC at none against A2L Certification Test Prep's 1. A2L Certification Test Prep's advantage is rating (5.0 vs 4.6) and update cadence (every 5 days vs every 3 weeks). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. A2L Certification Test Prep sells 1 one-off in-app purchase. AC  Service Tech LLC asks for nothing beyond the download.

A2L Certification Test Prep holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

AC  Service Tech LLC ships an update every 3 weeks, A2L Certification Test Prep every 5 days. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | AC  Service Tech LLC | A2L Certification Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/ac-service-tech-llc/id6759368574/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/a2l-certification-test-prep/id6760899340/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 45 MB | 47 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [AC Service Tech, LLC](https://appshunter.io/developer/1878336344) | [Mike Watson](https://appshunter.io/developer/1848411021) |

## What reviewers say

### AC  Service Tech LLC

[App page](https://appshunter.io/ios/app/ac-service-tech-llc/id6759368574)

This app provides a comprehensive platform for HVAC/R technicians and students to access educational resources. It features training videos, calculators, online courses with certificates, articles, and podcast episodes, all in one convenient location.

**Highlights:** Access online courses with certificates, Watch over 750 training videos, Utilize HVAC/R calculation tools, Read articles and listen to podcasts, Track learning progress, Downloadable training certificates

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is AC  Service Tech LLC free?

AC  Service Tech LLC is free to download, with no in-app purchases.

### Is A2L Certification Test Prep free?

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

### Which has better reviews, AC  Service Tech LLC or A2L Certification Test Prep?

A2L Certification Test Prep is rated higher. AC  Service Tech LLC averages 4.6 out of 5 from 5 ratings, while A2L Certification Test Prep averages 5.0 from 3 ratings.

### Do AC  Service Tech LLC or A2L Certification Test Prep have ads?

Both AC  Service Tech LLC and A2L Certification Test Prep show ads.

### Which is updated more often, AC  Service Tech LLC or A2L Certification Test Prep?

AC  Service Tech LLC ships an update every 3 weeks, and A2L Certification Test Prep every 5 days. Most recently, AC  Service Tech LLC was updated on September 30, 2026 and A2L Certification Test Prep on October 7, 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.*