# HVAC Know It All vs Visual3D App

The clearest difference is update cadence: Visual3D App at every 2 months against HVAC Know It All's every 6 months. Visual3D App also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. HVAC Know It All sells 2 in-app purchases, starting at $0.99 per month and Visual3D App sells 1 in-app purchase, starting at $12.95 per month. Whichever you choose, the download price is not the number that matters.

HVAC Know It All ships an update every 6 months, Visual3D App every 2 months. Both last shipped on October 16, 2026.

## The numbers

| Metric | HVAC Know It All | Visual3D App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (221 ratings)](https://appshunter.io/ios/app/hvac-know-it-all/id1548260016/reviews)** | — |
| Number of ratings | **221** | — |
| Positive reviews | 83.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Subscription | — |
| Size | 67 MB | 168 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [HVAC Know It All Inc.](https://appshunter.io/developer/1548260018) | [Nauman Innovation Group LLC](https://appshunter.io/developer/1764933586) |

## What reviewers say

### HVAC Know It All

[App page](https://appshunter.io/ios/app/hvac-know-it-all/id1548260016)

Connect with HVAC/R professionals to enhance your skills through educational discussions. This app aims to help technicians, installers, owners, educators, and students improve their expertise in the trade.

**Highlights:** Educational discussions, Professional networking, Skill enhancement, Trade knowledge sharing, Technician resources

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $9.99 | per year |

**What reviewers like**

- 👍 Excellent community for tradespeople
- 💡 Vast knowledge sharing among professionals
- 🚀 Game-changer for HVAC technicians
- 🤝 Supportive and non-judgmental environment
- 📚 Great resource for learning and growth

**What reviewers complain about**

- 💰 Forced to pay before accessing content
- 🤔 Subscription fee not clearly stated upfront
- 🚫 App makes you pay before you can test it
- 📉 Limited content in residential group
- ❓ Suspect 5-star reviews, potentially fake

**Requested features**

- More content for the residential group


### Visual3D App

[App page](https://appshunter.io/ios/app/visual3d-app/id6670464988)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single User Package | $12.95 | per month |


## Frequently asked questions

### Is HVAC Know It All free?

HVAC Know It All is free to download, with in-app purchases available.

### Is Visual3D App free?

Visual3D App is free to download, with in-app purchases available.

### Do HVAC Know It All or Visual3D App have ads?

Neither HVAC Know It All nor Visual3D App shows ads.

### Which is updated more often, HVAC Know It All or Visual3D App?

HVAC Know It All ships an update every 6 months, and Visual3D App every 2 months. Most recently, HVAC Know It All was updated on October 16, 2026 and Visual3D App on October 16, 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.*