# HVAC PT Chart vs CageWatch Technician

The clearest difference is in-app purchases: CageWatch Technician at none against HVAC PT Chart's 2. CageWatch Technician also leads on update cadence (every 2 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HVAC PT Chart sells 2 one-off in-app purchases. CageWatch Technician asks for nothing beyond the download.

HVAC PT Chart ships an update every 5 months, CageWatch Technician every 2 weeks. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | HVAC PT Chart | CageWatch Technician |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (8 ratings)](https://appshunter.io/ios/app/hvac-pt-chart/id508212589/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 10 MB | 3 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Skyko Design LLC](https://appshunter.io/developer/1886378061) |

## What reviewers say

### HVAC PT Chart

[App page](https://appshunter.io/ios/app/hvac-pt-chart/id508212589)

This tool provides HVAC technicians with instant access to pressure and temperature data for over 100 refrigerants. It allows users to input one value to find the other, view detailed refrigerant properties, and email comprehensive charts and data.

**Highlights:** Pressure/temperature lookup for 100+ refrigerants, Input temperature to find pressure, or vice versa, Slider control for precise value selection, Email complete PT chart lists and refrigerant properties, Display common refrigerant properties, Adjust for atmospheric pressure based on city elevation, English and Metric unit options

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Banner Display Ad | $0.99 | one-time |
| HVAC Equipment Locator | $9.99 | one-time |


### CageWatch Technician

[App page](https://appshunter.io/ios/app/cagewatch-technician/id6760817365)

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC PT Chart free?

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

### Is CageWatch Technician free?

CageWatch Technician is free to download, with no in-app purchases.

### Do HVAC PT Chart or CageWatch Technician have ads?

Neither HVAC PT Chart nor CageWatch Technician shows ads.

### Which is updated more often, HVAC PT Chart or CageWatch Technician?

HVAC PT Chart ships an update every 5 months, and CageWatch Technician every 2 weeks. Most recently, HVAC PT Chart was updated on November 6, 2026 and CageWatch Technician on November 9, 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.*