# HEAT3D Pro vs Thermal Transmittance Calc

The clearest difference is price: Thermal Transmittance Calc at Free against HEAT3D Pro's $690.00. HEAT3D Pro's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Thermal Transmittance Calc is free to download; HEAT3D Pro costs $690.00 up front. Thermal Transmittance Calc sells 2 one-off in-app purchases. HEAT3D Pro asks for nothing beyond the download.

HEAT3D Pro ships an update every 4 months, Thermal Transmittance Calc every 11 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | HEAT3D Pro | Thermal Transmittance Calc |
| --- | --- | --- |
| Price | $690.00 | **Free** |
| Rating | — | **[4.1 (11 ratings)](https://appshunter.io/ios/app/thermal-transmittance-calc/id1473745621/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | — | Free with in-app purchases |
| Size | 125 MB | 119 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Electric Pocket](https://appshunter.io/developer/324114799) | [ALEXEY KOZLOV](https://appshunter.io/developer/1393860478) |

## What reviewers say

### HEAT3D Pro

[App page](https://appshunter.io/ios/app/heat3d-pro/id1362512281)

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

**In-app purchases:** none


### Thermal Transmittance Calc

[App page](https://appshunter.io/ios/app/thermal-transmittance-calc/id1473745621)

Calculate heat loss and humidity issues in building structures. Input air temperature, humidity, and material layers to visualize temperature and dew point changes. Supports both Celsius/Fahrenheit and cm/inches.

**Highlights:** Calculate heat loss, Identify humidity problems, Visualize temperature and dew point changes, Supports Celsius and Fahrenheit, Supports centimeters and inches, Easy data entry and immediate results

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Creating a new material | $2.99 | one-time |


## Frequently asked questions

### Is HEAT3D Pro free?

HEAT3D Pro costs $690.00, with no in-app purchases.

### Is Thermal Transmittance Calc free?

Thermal Transmittance Calc is free to download, with in-app purchases available.

### Do HEAT3D Pro or Thermal Transmittance Calc have ads?

Thermal Transmittance Calc shows ads; HEAT3D Pro does not.

### Which is updated more often, HEAT3D Pro or Thermal Transmittance Calc?

HEAT3D Pro ships an update every 4 months, and Thermal Transmittance Calc every 11 months. Most recently, HEAT3D Pro was updated on November 2, 2026 and Thermal Transmittance Calc on November 6, 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.*