# HVAC Tools PT Chart vs AppAirTools

The clearest difference is update cadence: AppAirTools at every 3 days against HVAC Tools PT Chart's monthly. AppAirTools also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18). On price, ads and in-app purchases 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 AppAirTools sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

HVAC Tools PT Chart ships an update monthly, AppAirTools every 3 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HVAC Tools PT Chart | AppAirTools |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Size | 9 MB | 136 MB |
| Requires iOS | 18 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Karol Jaworski](https://appshunter.io/developer/1799974477) | [wanchai khwunkhum](https://appshunter.io/developer/6807079696) |

## 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 |


### AppAirTools

[App page](https://appshunter.io/ios/app/appairtools/id6807079694)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| สมาชิกรายเดือน | $0.99 | per month |


## Frequently asked questions

### Is HVAC Tools PT Chart free?

HVAC Tools PT Chart is free to download, with in-app purchases available.

### Is AppAirTools free?

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

### Do HVAC Tools PT Chart or AppAirTools have ads?

Neither HVAC Tools PT Chart nor AppAirTools shows ads.

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

HVAC Tools PT Chart ships an update monthly, and AppAirTools every 3 days. Most recently, HVAC Tools PT Chart was updated on October 28, 2026 and AppAirTools on October 31, 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.*