Clik Cert vs HVAC ToolKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clik Cert
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Complete your certificates digitally, simply, quickly Description: Speed up the entire gas certification process with the Clik Cert apps. Reduce certificate waste and go paperless. With an extensive library of certificates, the Clik Cert app is the solution to help engineers manage their work. The app works alongside the Clik Cert software for Windows. Quickly create and edit certs on your device, get a signature from your customers and upload them back to your team in the office. Complete, export and email your certs direct to your client when out in the field and create professional certificates every time. Features Works offline Complete, export as PDF and email your certs from the app App syncs to the Clik Cert desktop software Link certificates to your customers, sites and equipment Create cert templates to make future work easier Capture signatures from your customers
HVAC ToolKit
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.
- Friction loss calculations
- Pipe sizing tools
- Ventilation and pressurization calculators
- Heat load and pump head estimations
- Metric/Imperial unit support
- English/Arabic language options
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The HVAC ToolKit is an easy-to-use app that has been created to assist HVAC engineers in checking their designs and making quick calculations and estimations. The app includes helpful calculation tools for calculating friction losses in ducting, pipe sizing, parking ventilation, staircase pressurization, and estimating heat loads, pump head, fan ESP, among others, where the user is able to enter the required inputs and is given the calculated output. Each tool also includes instructions and abbreviated formulas that have been used to calculate the results. The app can be set to metric or imperial units and/or to the English or Arabic language. Users are expected to have some knowledge and understanding of HVAC engineering in order to use the tools properly. Users are also expected to check that the results are within an acceptable range for their respective projects. If you come across any inconsistencies while using the app or have any recommendations for additional inclusions, please contact us.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Clik Cert | HVAC ToolKit |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Clik | Mohamad Jaber |
In-app purchases
Clik Cert
No in-app purchases
HVAC ToolKit
No in-app purchases









