# AC  Service Tech LLC vs HVAC Mastery

The clearest difference is ads: HVAC Mastery at none against AC  Service Tech LLC's shown. HVAC Mastery also leads on review sentiment (100% vs 67%) and update cadence (daily vs every 3 weeks). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HVAC Mastery holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 67% of AC  Service Tech LLC's written reviews are positive against 100% of HVAC Mastery's.

AC  Service Tech LLC ships an update every 3 weeks, HVAC Mastery daily. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AC  Service Tech LLC | HVAC Mastery |
| --- | --- | --- |
| 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/hvac-mastery/id6773027290/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | Free |
| Size | 45 MB | 24 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [AC Service Tech, LLC](https://appshunter.io/developer/1878336344) | [arjan qema](https://appshunter.io/developer/1895283314) |

## 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


### HVAC Mastery

[App page](https://appshunter.io/ios/app/hvac-mastery/id6773027290)

This app offers a comprehensive learning experience for HVAC professionals and apprentices. It features interactive diagrams, hands-on challenges, and field reference tools to master the trade and prepare for certification exams.

**Highlights:** Structured learning tracks, Interactive electrical and refrigerant simulators, Hands-on wiring and troubleshooting challenges, Field reference tools and calculators, Flashcards and progress tracking, Cloud sync across devices

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

**In-app purchases:** none


## Frequently asked questions

### Is AC  Service Tech LLC free?

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

### Is HVAC Mastery free?

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

### Which has better reviews, AC  Service Tech LLC or HVAC Mastery?

HVAC Mastery is rated higher. AC  Service Tech LLC averages 4.6 out of 5 from 5 ratings, while HVAC Mastery averages 5.0 from 3 ratings.

### Do AC  Service Tech LLC or HVAC Mastery have ads?

AC  Service Tech LLC shows ads; HVAC Mastery does not.

### Which is updated more often, AC  Service Tech LLC or HVAC Mastery?

AC  Service Tech LLC ships an update every 3 weeks, and HVAC Mastery daily. Most recently, AC  Service Tech LLC was updated on October 24, 2026 and HVAC Mastery on October 31, 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.*