# HVAC Tools PT Chart vs HVAC Tech Assistant

The clearest difference is update cadence: HVAC Tech Assistant at fortnightly against HVAC Tools PT Chart's monthly. HVAC Tools PT Chart's advantage is iOS requirement (18 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HVAC Tools PT Chart sells 3 in-app purchases, starting at $4.99 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.

HVAC Tools PT Chart ships an update monthly, HVAC Tech Assistant fortnightly. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | HVAC Tools PT Chart | HVAC Tech Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 9 MB | 13 MB |
| Requires iOS | **18** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Karol Jaworski](https://appshunter.io/developer/1799974477) | [Chris Johnston](https://appshunter.io/developer/1871798616) |

## What reviewers say

### HVAC Tools PT Chart

[App page](https://appshunter.io/ios/app/hvac-tools-pt-chart-gauge/id6760602879)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gauge Pro | $4.99 | per month |
| Gauge Pro | $39.99 | per year |
| Gauge Pro | $39.99 | per year |


### 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 HVAC Tools PT Chart free?

HVAC Tools PT Chart 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 HVAC Tools PT Chart or HVAC Tech Assistant have ads?

Neither HVAC Tools PT Chart nor HVAC Tech Assistant shows ads.

### Which is updated more often, HVAC Tools PT Chart or HVAC Tech Assistant?

HVAC Tools PT Chart ships an update monthly, and HVAC Tech Assistant fortnightly. Most recently, HVAC Tools PT Chart was updated on October 26, 2026 and HVAC Tech Assistant on October 7, 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.*