# Oventrop vs SmartKap

The clearest difference is update cadence: Oventrop at monthly against SmartKap's every 7 months. SmartKap's advantage is iOS requirement (12.4 vs 15.6). 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.

Oventrop ships an update monthly, SmartKap every 7 months. Both last shipped on September 29, 2026.

## The numbers

| Metric | Oventrop | SmartKap |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free | — |
| Size | 48 MB | 60 MB |
| Requires iOS | 15.6 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oventrop GmbH & Co. KG](https://appshunter.io/developer/396298549) | [SAUERMANN INDUSTRIE](https://appshunter.io/developer/1169513729) |

## 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


### SmartKap

[App page](https://appshunter.io/ios/app/smartkap/id1459970913)

**In-app purchases:** none


## Frequently asked questions

### Is Oventrop free?

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

### Is SmartKap free?

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

### Do Oventrop or SmartKap have ads?

Neither Oventrop nor SmartKap shows ads.

### Which is updated more often, Oventrop or SmartKap?

Oventrop ships an update monthly, and SmartKap every 7 months. Most recently, Oventrop was updated on September 29, 2026 and SmartKap on September 29, 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.*