# Oventrop vs h,x Calculator

The clearest difference is update cadence: Oventrop at monthly against h,x Calculator's every 4 months. h,x Calculator's advantage is iOS requirement (7.0 vs 15.6). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Oventrop against 5.0 for h,x Calculator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Oventrop ships an update monthly, h,x Calculator every 4 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Oventrop | h,x Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/oventrop/id396320655/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/hx-calculator/id903871074/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Size | 48 MB | 27 MB |
| Requires iOS | 15.6 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oventrop GmbH & Co. KG](https://appshunter.io/developer/396298549) | [Condair GmbH](https://appshunter.io/developer/903871077) |

## What reviewers say

### Oventrop

[App page](https://appshunter.io/ios/app/oventrop/id396320655)

This app assists with the design, calculation, and documentation of hydronic balancing for heating systems. It supports various standards and regulations, enabling users to calculate valve presets, heating loads, and radiator sizes. Documentation can be generated in PDF format or printed wirelessly.

**Highlights:** Project design with calculations (VdZ, BEG), Heating check according to EnSimiMaV and DIN SPEC 15378, OV-DMC 3 measuring system integration, Simplified heating load calculation (DIN 12831), DIN radiator and thermostatic valve sizing, ErP energy efficiency label creation, PDF documentation and wireless printing

**Features:** macOS Compatibility

**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 Oventrop free?

Oventrop 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.

### Which has better reviews, Oventrop or h,x Calculator?

Oventrop and h,x Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

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

Neither Oventrop nor h,x Calculator shows ads.

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

Oventrop ships an update monthly, and h,x Calculator every 4 months. Most recently, Oventrop was updated on October 23, 2026 and h,x Calculator on October 24, 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.*