# WhatWhere? vs HVAC Mastery

The clearest difference is rating: HVAC Mastery at 5.0 against WhatWhere?'s 2.0. HVAC Mastery also leads on iOS requirement (14.0 vs 17.0). On price, ratings volume, ads and in-app purchases 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 2.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

## The numbers

| Metric | WhatWhere? | HVAC Mastery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/whatwhere/id1282350032/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hvac-mastery/id6773027290/reviews)** |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 100 months | — |
| Monetization | Free | Free |
| Size | 185 MB | 21 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robert L Zimmelman](https://appshunter.io/developer/954130860) | [arjan qema](https://appshunter.io/developer/1895283314) |

## What reviewers say

### WhatWhere?

[App page](https://appshunter.io/ios/app/whatwhere/id1282350032)

Identify unknown items, locations, and concepts within an image using on-device AI. This app analyzes pictures privately using your device's built-in AI hardware, working even in airplane mode without sending data to external servers.

**Highlights:** On-device AI analysis, Works offline, Identifies items in images, Analyzes locations, Recognizes key concepts, Uses device's AI hardware

**In-app purchases:** none


### HVAC Mastery

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

This app provides hands-on learning for HVAC professionals, covering fundamentals, core and advanced systems, and EPA 608 certification prep. It features interactive diagrams, simulators, real-world challenges, and quick reference tools for on-the-job use.

**Highlights:** Structured learning tracks, Interactive electrical and wiring simulators, Refrigerant cycle simulator with fault injection, Built-in HVAC calculators, Hands-on wiring and troubleshooting challenges, Field reference tools and refrigerant guide, Flashcards and progress tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is WhatWhere? free?

WhatWhere? 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, WhatWhere? or HVAC Mastery?

HVAC Mastery is rated higher. WhatWhere? averages 2.0 out of 5 from 1 ratings, while HVAC Mastery averages 5.0 from 2 ratings.

### Do WhatWhere? or HVAC Mastery have ads?

Neither WhatWhere? nor HVAC Mastery shows ads.

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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.*