# HVAC Toolkit vs Psychrometric Chart

The clearest difference is price: HVAC Toolkit at $23.99 against Psychrometric Chart's $59.99. HVAC Toolkit also leads on rating (5.0 vs 4.4) and review sentiment (73% vs 33%). Psychrometric Chart's advantage is ratings volume (34 vs 2) and update cadence (every 3 months vs every 6 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

HVAC Toolkit costs $23.99 and Psychrometric Chart $59.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HVAC Toolkit holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Psychrometric Chart has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of HVAC Toolkit's written reviews are positive against 33% of Psychrometric Chart's.

HVAC Toolkit ships an update every 6 months, Psychrometric Chart every 3 months. The most recent releases landed on September 14, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | HVAC Toolkit | Psychrometric Chart |
| --- | --- | --- |
| Price | **$23.99** | $59.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hvac-toolkit/id354558963/reviews)** | [4.4 (34 ratings)](https://appshunter.io/ios/app/psychrometric-chart/id1026273214/reviews) |
| Number of ratings | 2 | **34** |
| Positive reviews | **73.3% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 50 MB | 32 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Pheinex, LLC](https://appshunter.io/developer/996932317) |

## What reviewers say

### HVAC Toolkit

[App page](https://appshunter.io/ios/app/hvac-toolkit/id354558963)

This comprehensive toolkit offers essential HVAC calculations and tools for professionals. It combines multiple specialized applications into a single, convenient package for iPhone and iPad users.

**Highlights:** Equipment tracking and customization, Refrigerant pressure-temperature charts, Refrigerant charge calculations, Duct sizing, Cooling and heating load calculations, Psychrometric calculations, Steam tables, Pipe sizing for liquid, steam, and gas

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

**In-app purchases:** none


### Psychrometric Chart

[App page](https://appshunter.io/ios/app/psychrometric-chart/id1026273214)

An interactive tool for HVAC engineers to create and manipulate psychrometric charts. Model various air processes, add and adjust state points with live property updates, and save multiple charts. Export your designs as PDFs or via AirPrint.

**Highlights:** Interactive psychrometric charts, Model air mixing and heating/cooling, Live state point adjustment, SI and IP unit support, Save and manage multiple charts, Export charts as PDF, AirPrint compatibility

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Toolkit free?

HVAC Toolkit costs $23.99, with no in-app purchases.

### Is Psychrometric Chart free?

Psychrometric Chart costs $59.99, with no in-app purchases.

### Which has better reviews, HVAC Toolkit or Psychrometric Chart?

HVAC Toolkit is rated higher. HVAC Toolkit averages 5.0 out of 5 from 2 ratings, while Psychrometric Chart averages 4.4 from 34 ratings.

### Do HVAC Toolkit or Psychrometric Chart have ads?

Neither HVAC Toolkit nor Psychrometric Chart shows ads.

### Which is updated more often, HVAC Toolkit or Psychrometric Chart?

HVAC Toolkit ships an update every 6 months, and Psychrometric Chart every 3 months. Most recently, HVAC Toolkit was updated on September 14, 2026 and Psychrometric Chart 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.*