# Techno System vs HVAC ToolKit

The clearest difference is price: Techno System at Free against HVAC ToolKit's $9.99. HVAC ToolKit's advantage is update cadence (every 3 months vs every 19 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Techno System is free to download; HVAC ToolKit costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Techno System ships an update every 19 months, HVAC ToolKit every 3 months. The most recent releases landed on June 3, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Techno System | HVAC ToolKit |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hvac-toolkit/id1623246775/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 months** |
| Monetization | **Free** | Paid |
| Size | 10 MB | 60 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TNX srl](https://appshunter.io/developer/460967609) | [Mohamad Jaber](https://appshunter.io/developer/1623246777) |

## What reviewers say

### Techno System

[App page](https://appshunter.io/ios/app/techno-system/id1083928221)

This application assists users in identifying suitable plate heat exchangers for standard civilian uses. It also facilitates contact with technical support for industrial applications and helps locate nearby suppliers. Additional features include a unit converter and a comparison tool for exchangers.

**Highlights:** Identify heat exchangers for civilian applications, Contact tech support for industrial applications, Find closest supplier, Technical measurement unit conversion, Compare Techno System exchangers

**Features:** macOS Compatibility

**In-app purchases:** none


### HVAC ToolKit

[App page](https://appshunter.io/ios/app/hvac-toolkit/id1623246775)

This application provides HVAC engineers with tools for design checks and quick calculations. It offers various calculators for ducting friction, pipe sizing, ventilation, and heat load estimations, with clear instructions and formulas. Users can switch between metric and imperial units, and English or Arabic languages.

**Highlights:** Friction loss calculations, Pipe sizing tools, Ventilation and pressurization calculators, Heat load and pump head estimations, Metric/Imperial unit support, English/Arabic language options

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Techno System free?

Techno System is free to download, with no in-app purchases.

### Is HVAC ToolKit free?

HVAC ToolKit costs $9.99, with no in-app purchases.

### Do Techno System or HVAC ToolKit have ads?

Neither Techno System nor HVAC ToolKit shows ads.

### Which is updated more often, Techno System or HVAC ToolKit?

Techno System ships an update every 19 months, and HVAC ToolKit every 3 months. Most recently, Techno System was updated on June 3, 2026 and HVAC ToolKit on September 8, 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.*