# Psychrometric Chart vs Psychro Chart

The clearest difference is price: Psychro Chart at Free against Psychrometric Chart's $59.99. Psychro Chart also leads on rating (4.8 vs 4.4) and iOS requirement (7.0 vs 15.0). Psychrometric Chart's advantage is review sentiment (33% vs 0%) and update cadence (every 3 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

Psychro Chart is free to download; Psychrometric Chart costs $59.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Psychro Chart holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Psychrometric Chart has 35 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 33% of Psychrometric Chart's written reviews are positive against 0% of Psychro Chart's, so the app with the better star average is not the one people write more warmly about.

Psychrometric Chart ships an update every 3 months, Psychro Chart every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Psychrometric Chart | Psychro Chart |
| --- | --- | --- |
| Price | $59.99 | **Free** |
| Rating | [4.4 (35 ratings)](https://appshunter.io/ios/app/psychrometric-chart/id1026273214/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/psychro-chart/id1072047219/reviews)** |
| Number of ratings | **35** | 6 |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Paid | **Free** |
| Size | 32 MB | 27 MB |
| Requires iOS | 15.0 | **7.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pheinex, LLC](https://appshunter.io/developer/996932317) | [Condair GmbH](https://appshunter.io/developer/903871077) |

## What reviewers say

### 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


### Psychro Chart

[App page](https://appshunter.io/ios/app/psychro-chart/id1072047219)

This app simplifies complex air humidity calculations for humidification and heating needs. It allows for quick and accurate assessment of various scenarios using psychrometric or Mollier diagrams.

**Highlights:** Calculate air conditions, Determine humidification/heating needs, Perform psychrometric calculations, Use Mollier diagrams, Assess scenarios quickly

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Psychrometric Chart free?

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

### Is Psychro Chart free?

Psychro Chart is free to download, with no in-app purchases.

### Which has better reviews, Psychrometric Chart or Psychro Chart?

Psychro Chart is rated higher. Psychrometric Chart averages 4.4 out of 5 from 35 ratings, while Psychro Chart averages 4.8 from 6 ratings.

### Do Psychrometric Chart or Psychro Chart have ads?

Neither Psychrometric Chart nor Psychro Chart shows ads.

### Which is updated more often, Psychrometric Chart or Psychro Chart?

Psychrometric Chart ships an update every 3 months, and Psychro Chart every 9 months. Most recently, Psychrometric Chart was updated on November 1, 2026 and Psychro Chart on November 2, 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.*