# Clik Cert vs HVAC ToolKit

The clearest difference is price: Clik Cert at Free against HVAC ToolKit's $9.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

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

Clik Cert ships an update every 2 months, HVAC ToolKit every 3 months. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Clik Cert | HVAC ToolKit |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hvac-toolkit/id1623246775/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Paid |
| Size | 22 MB | 60 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Clik](https://appshunter.io/developer/545669416) | [Mohamad Jaber](https://appshunter.io/developer/1623246777) |

## What reviewers say

### Clik Cert

[App page](https://appshunter.io/ios/app/clik-cert/id1540098941)

**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 Clik Cert free?

Clik Cert is free to download, with no in-app purchases.

### Is HVAC ToolKit free?

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

### Do Clik Cert or HVAC ToolKit have ads?

Neither Clik Cert nor HVAC ToolKit shows ads.

### Which is updated more often, Clik Cert or HVAC ToolKit?

Clik Cert ships an update every 2 months, and HVAC ToolKit every 3 months. Most recently, Clik Cert was updated on September 23, 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.*