# Oventrop vs Lange ProApp

The clearest difference is review sentiment: Lange ProApp at 100% against Oventrop's 44%. Oventrop's advantage is update cadence (monthly vs every 13 months). 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.

Oventrop ships an update monthly, Lange ProApp every 13 months. The most recent releases landed on October 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Oventrop | Lange ProApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/oventrop/id396320655/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 44.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 13 months |
| Monetization | Free | Free |
| Size | 48 MB | 18 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oventrop GmbH & Co. KG](https://appshunter.io/developer/396298549) | [SCT Schiele GmbH](https://appshunter.io/developer/483354490) |

## 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


### Lange ProApp

[App page](https://appshunter.io/ios/app/lange-proapp/id1319205171)

This app provides professionals in the SHK trade with essential tools for their daily work. Access real-time pricing, stock information, orders, offers, and delivery notes. Features include a barcode scanner and navigation to warehouse locations.

**Highlights:** Real-time pricing and stock display, View orders, offers, and delivery notes, Barcode scanner for quick item entry, Find and navigate to warehouse locations, Intuitive interface for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Oventrop free?

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

### Is Lange ProApp free?

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

### Do Oventrop or Lange ProApp have ads?

Neither Oventrop nor Lange ProApp shows ads.

### Which is updated more often, Oventrop or Lange ProApp?

Oventrop ships an update monthly, and Lange ProApp every 13 months. Most recently, Oventrop was updated on October 23, 2026 and Lange ProApp on October 6, 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.*