# CoolCalc vs HVAC Tech Assistant

The clearest difference is iOS requirement: CoolCalc at 16.0 against HVAC Tech Assistant's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. CoolCalc sells 3 in-app purchases, starting at $9.99 per month and HVAC Tech Assistant sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

CoolCalc ships an update monthly, HVAC Tech Assistant fortnightly. The most recent releases landed on October 15, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | CoolCalc | HVAC Tech Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 13 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [杰 陈](https://appshunter.io/developer/1746018277) | [Chris Johnston](https://appshunter.io/developer/1871798616) |

## What reviewers say

### CoolCalc

[App page](https://appshunter.io/ios/app/coolcalc-hvac-tools/id6773545951)

This offline toolkit for service technicians provides essential HVAC calculations, job documentation, and professional PDF reporting. It supports A2L refrigerants and prioritizes user privacy with no account or cloud storage required.

**Highlights:** Offline HVAC calculations, PT Chart and Charge Check, Duct Sizing and Airflow Calcs, Capacitor and Refrigerant Log, Professional PDF report generation, A2L refrigerant support, Privacy-focused, no account needed

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoolCalc Pro Monthly | $9.99 | per month |
| CoolCalc Pro Yearly | $59.99 | per year |
| CoolCalc Pro Lifetime | $99.99 | one-time |


### HVAC Tech Assistant

[App page](https://appshunter.io/ios/app/hvac-tech-assistant/id6774753684)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Deep Storm Alpha HVAC Premium | $5.99 | per month |
| Premium Yearly | $59.99 | per year |
| 50 AI Credits | $4.99 | one-time |


## Frequently asked questions

### Is CoolCalc free?

CoolCalc is free to download, with in-app purchases available.

### Is HVAC Tech Assistant free?

HVAC Tech Assistant is free to download, with in-app purchases available.

### Do CoolCalc or HVAC Tech Assistant have ads?

Neither CoolCalc nor HVAC Tech Assistant shows ads.

### Which is updated more often, CoolCalc or HVAC Tech Assistant?

CoolCalc ships an update monthly, and HVAC Tech Assistant fortnightly. Most recently, CoolCalc was updated on October 15, 2026 and HVAC Tech Assistant on September 20, 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.*