# Reflex Pro App vs h,x

The clearest difference is iOS requirement: h,x at 12.0 against Reflex Pro App's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Reflex Pro App | h,x |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free | — |
| Size | 19 MB | 60 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ConSoft](https://appshunter.io/developer/397747217) | [Condair GmbH](https://appshunter.io/developer/903871077) |

## What reviewers say

### Reflex Pro App

[App page](https://appshunter.io/ios/app/reflex-pro-app/id424178409)

This app provides instant calculations for pressure maintenance in heating, solar, and hot water systems. It helps define pressures and account for water hardness, aiding in project surveys and on-site consultations for accurate system assessments.

**Highlights:** Pressure maintenance calculations, Expansion vessel calculation, Upstream and filling pressure definition, Water hardness consideration, VDI 2035 compliance, On-site project surveys

**Features:** macOS Compatibility

**In-app purchases:** none


### h,x

[App page](https://appshunter.io/ios/app/hx-calculator/id1636696423)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Reflex Pro App free?

Reflex Pro App is free to download, with no in-app purchases.

### Is h,x free?

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

### Do Reflex Pro App or h,x have ads?

Neither Reflex Pro App nor h,x shows ads.

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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.*