# Isover SmartAPP vs Thermal Transmittance Calc

The clearest difference is in-app purchases: Isover SmartAPP at none against Thermal Transmittance Calc's 2. Isover SmartAPP also leads on ads (none vs shown) and update cadence (every 3 months vs every 11 months). On price and device support there is nothing between them.

Both are free to download. Thermal Transmittance Calc sells 2 one-off in-app purchases. Isover SmartAPP asks for nothing beyond the download.

Isover SmartAPP ships an update every 3 months, Thermal Transmittance Calc every 11 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Isover SmartAPP | Thermal Transmittance Calc |
| --- | --- | --- |
| Price | Free | 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 3 months** | Every 11 months |
| Monetization | — | Free with in-app purchases |
| Size | 136 MB | 119 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DAMI development s.r.o.](https://appshunter.io/developer/469251527) | [ALEXEY KOZLOV](https://appshunter.io/developer/1393860478) |

## What reviewers say

### Isover SmartAPP

[App page](https://appshunter.io/ios/app/isover-smartapp/id974089598)

**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 Isover SmartAPP free?

Isover SmartAPP is free to download, with no in-app purchases.

### Is Thermal Transmittance Calc free?

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

### Do Isover SmartAPP or Thermal Transmittance Calc have ads?

Thermal Transmittance Calc shows ads; Isover SmartAPP does not.

### Which is updated more often, Isover SmartAPP or Thermal Transmittance Calc?

Isover SmartAPP ships an update every 3 months, and Thermal Transmittance Calc every 11 months. Most recently, Isover SmartAPP was updated on October 14, 2026 and Thermal Transmittance Calc on October 24, 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.*