# HyTools vs h,x Calculator

The clearest difference is update cadence: HyTools at every 6 weeks against h,x Calculator's every 4 months. h,x Calculator's advantage is iOS requirement (7.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HyTools ships an update every 6 weeks, h,x Calculator every 4 months. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | HyTools | h,x Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/hytools/id537674477/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 114 MB | 27 MB |
| Requires iOS | 15.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMI Hydronic Engineering International SA](https://appshunter.io/developer/508015425) | [Condair GmbH](https://appshunter.io/developer/903871077) |

## What reviewers say

### HyTools

[App page](https://appshunter.io/ios/app/hytools/id537674477)

This app provides HVAC professionals with a comprehensive suite of hydronic calculation tools. It assists with tasks like valve sizing, pressure drop calculations, and radiator power estimation. The tool offers unit conversion and language selection for user convenience.

**Highlights:** Hydronic calculator, Valve sizing and presetting, Radiator power estimation, Pipe sizing, Unit conversion, Pressure maintenance calculation

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

**In-app purchases:** none


### h,x Calculator

[App page](https://appshunter.io/ios/app/hx-calculator/id903871074)

This software calculates air condition changes during adiabatic or isothermal humidification processes. It determines air states before and after humidification, humidification power, and heating power. The app supports both metric and imperial units.

**Highlights:** Calculate air condition changes, Determine humidification power, Calculate heating power, Generate h,x diagram, Metric and imperial unit support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HyTools free?

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

### Is h,x Calculator free?

h,x Calculator is free to download, with no in-app purchases.

### Do HyTools or h,x Calculator have ads?

Neither HyTools nor h,x Calculator shows ads.

### Which is updated more often, HyTools or h,x Calculator?

HyTools ships an update every 6 weeks, and h,x Calculator every 4 months. Most recently, HyTools was updated on September 28, 2026 and h,x Calculator on October 11, 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.*