HVAC School vs Visual3D App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HVAC School
This app serves as a comprehensive resource for HVAC technicians, offering a podcast, tech tip articles, and interactive calculators. It aims to enhance knowledge of HVAC theory, industry updates, and essential mathematics for both current and aspiring professionals.
- HVAC School podcast episodes
- Tech tip articles by professionals
- Interactive HVAC equation calculators
- Industry knowledge and theory
- Up-to-date industry information
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The app that helps you remember some things you forgot along the way, as well as helps you remember some things you forgot to know in the first place. For all current and aspiring HVAC technicians: HVAC School is the premiere source for knowledge and success in the HVAC industry. With this app you can: * Listen to all episodes of the HVAC School podcast, a podcast committed to bringing you relevant and up to date knowledge of the HVAC industry and what it means to be an HVAC technician. * Read tech tip articles written by industry professionals on various topics to help build your knowledge base and understanding of HVAC theory * Interact with calculators that employ common HVAC equations to help build your understanding of important HVAC mathematics
Visual3D App
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Visual3D is a simple app for HVAC technicians. It helps you visualize systems and troubleshoot issues easily. Work smarter with clear 3D models and helpful tools. Terms of Use (EULA): https://visual3dacademy.com/eula
Screenshots
Verdict
The clearest difference is in-app purchases: HVAC School at none against Visual3D App's 1. On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Visual3D App sells 1 in-app purchase, starting at $12.95 per month. HVAC School asks for nothing beyond the download.
HVAC School ships an update every 5 weeks, Visual3D App every 2 months. The most recent releases landed on October 16, 2026 and September 30, 2026 respectively.
| Parameter | HVAC School | Visual3D App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (85 ratings) — better | — |
| Positive reviews | 82.8% of reviews | — |
| Number of ratings | 85 — better | — |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 168 MB |
| Age rating | 12+ | 17+ |
| Developer | Kalos Services Inc. | Nauman Innovation Group LLC |
In-app purchases
HVAC School
No in-app purchases
Visual3D App
- Single User Package$12.951 Month
Questions
Is HVAC School free?
Is Visual3D App free?
Do HVAC School or Visual3D App have ads?
Which is updated more often, HVAC School or Visual3D App?
Other comparisons
