# Study Guide Pro vs HVAC/R AI Pro

The clearest difference is price: HVAC/R AI Pro at Free against Study Guide Pro's $2.99. HVAC/R AI Pro also leads on rating (4.6 vs 4.0) and update cadence (every 5 weeks vs every 2 months). Study Guide Pro's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On ratings volume, ads and iOS requirement there is nothing between them.

HVAC/R AI Pro is free to download; Study Guide Pro costs $2.99 up front. HVAC/R AI Pro sells 2 in-app purchases, starting at $9.99 per month. Study Guide Pro asks for nothing beyond the download.

HVAC/R AI Pro holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

Study Guide Pro ships an update every 2 months, HVAC/R AI Pro every 5 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Study Guide Pro | HVAC/R AI Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/study-guide-pro/id916066498/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/hvacr-ai-pro/id6747730624/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 94 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Pablo Arista](https://appshunter.io/developer/912273635) | [Cowboy G Industries LLC](https://appshunter.io/developer/1822667807) |

## What reviewers say

### Study Guide Pro

[App page](https://appshunter.io/ios/app/study-guide-pro/id916066498)

Create and review custom study guides for any subject. Organize questions and answers, randomize them for practice, and access your guides on your Apple Watch. Perfect for preparing for quizzes, tests, and certifications.

**Highlights:** Create custom study guides, Add questions and answers, Randomize question order, Create multiple guides, Edit existing entries, Apple Watch integration

**Features:** macOS Compatibility

**In-app purchases:** none


### HVAC/R AI Pro

[App page](https://appshunter.io/ios/app/hvacr-ai-pro/id6747730624)

This app provides HVAC and refrigeration technicians with AI-powered diagnostic assistance, duct sizing calculations, and job estimation tools. It offers step-by-step troubleshooting, airflow analysis, and photo-based equipment support to streamline service calls.

**Highlights:** AI Diagnostic Assistant, Step-by-step troubleshooting, Duct sizing calculations, Airflow analysis, Job estimate tool, Photo-based equipment support, Chat history

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Plan | $9.99 | per month |
| Pro | $19.99 | per month |


## Frequently asked questions

### Is Study Guide Pro free?

Study Guide Pro costs $2.99, with no in-app purchases.

### Is HVAC/R AI Pro free?

HVAC/R AI Pro is free to download, with in-app purchases available.

### Which has better reviews, Study Guide Pro or HVAC/R AI Pro?

HVAC/R AI Pro is rated higher. Study Guide Pro averages 4.0 out of 5 from 2 ratings, while HVAC/R AI Pro averages 4.6 from 5 ratings.

### Do Study Guide Pro or HVAC/R AI Pro have ads?

Neither Study Guide Pro nor HVAC/R AI Pro shows ads.

### Which is updated more often, Study Guide Pro or HVAC/R AI Pro?

Study Guide Pro ships an update every 2 months, and HVAC/R AI Pro every 5 weeks. Most recently, Study Guide Pro was updated on November 1, 2026 and HVAC/R AI Pro on October 30, 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.*