# Touch Fluids vs Psychrometry Chart

The clearest difference is review sentiment: Touch Fluids at 60% against Psychrometry Chart's 0%. Touch Fluids also leads on price ($0.99 vs $1.99). Psychrometry Chart's advantage is update cadence (every 2 weeks vs every 13 months) and iOS requirement (15.6 vs 17.2). On ads, in-app purchases, monetization model and device support there is nothing between them.

Touch Fluids costs $0.99 and Psychrometry Chart $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Touch Fluids ships an update every 13 months, Psychrometry Chart every 2 weeks. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Touch Fluids | Psychrometry Chart |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/touch-fluids/id427420343/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Size | 15 MB | 3 MB |
| Requires iOS | 17.2 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xavier Daxhelet](https://appshunter.io/developer/339056993) | [Konstantinos Ladiellis](https://appshunter.io/developer/1516103440) |

## What reviewers say

### Touch Fluids

[App page](https://appshunter.io/ios/app/touch-fluids/id427420343)

An educational tool for fluid mechanics courses, featuring basic equations and animations. It covers topics from fluid statics to flow in pipes, suitable for high school and university students. Teachers can use it to present concepts in class.

**Highlights:** Basic fluid mechanics equations, Illustrative animations, Fluid statics, Fluid in motion, Continuity and energy equations, Flow in pipes, Vector operations

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

**In-app purchases:** none


### Psychrometry Chart

[App page](https://appshunter.io/ios/app/psychrometry-chart/id1516103441)

This app calculates and displays thermodynamic properties of moist air mixtures. It supports both SI and imperial units, allowing users to find values like dry-bulb temperature, relative humidity, and enthalpy by interacting with a chart. It also computes thermal comfort parameters.

**Highlights:** Moist air property calculation, SI and imperial unit support, Interactive chart with reticle, Displays dry-bulb temp, humidity, enthalpy, Calculates PMV/PPD thermal comfort

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

**In-app purchases:** none


## Frequently asked questions

### Is Touch Fluids free?

Touch Fluids costs $0.99, with no in-app purchases.

### Is Psychrometry Chart free?

Psychrometry Chart costs $1.99, with no in-app purchases.

### Do Touch Fluids or Psychrometry Chart have ads?

Neither Touch Fluids nor Psychrometry Chart shows ads.

### Which is updated more often, Touch Fluids or Psychrometry Chart?

Touch Fluids ships an update every 13 months, and Psychrometry Chart every 2 weeks. Most recently, Touch Fluids was updated on October 13, 2026 and Psychrometry Chart on October 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.*