# Korubin Tools vs Kontakapp

The clearest difference is update cadence: Kontakapp at every 5 days against Korubin Tools's every 3 months. Korubin Tools's advantage is iOS requirement (9.2 vs 15.1). 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.

Korubin Tools ships an update every 3 months, Kontakapp every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Korubin Tools | Kontakapp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 13 MB | 26 MB |
| Requires iOS | **9.2** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Envest](https://appshunter.io/developer/1000176195) | [GOGOGO LLC](https://appshunter.io/developer/1735506416) |

## What reviewers say

### Korubin Tools

[App page](https://appshunter.io/ios/app/korubin-tools/id943446457)

This utility app performs various efficiency analyses for cables and pipes, including basic and advanced calculations. It helps users analyze system performance, power consumption, and fluid dynamics.

**Highlights:** Basic efficiency analysis, Advanced efficiency calculations, Cable efficiency analysis, Pipe efficiency calculations, Hydraulic and system efficiency metrics, Fluid dynamics parameters

**Features:** macOS Compatibility

**In-app purchases:** none


### Kontakapp

[App page](https://appshunter.io/ios/app/kontakapp/id6741116147)

**In-app purchases:** none


## Frequently asked questions

### Is Korubin Tools free?

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

### Is Kontakapp free?

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

### Do Korubin Tools or Kontakapp have ads?

Neither Korubin Tools nor Kontakapp shows ads.

### Which is updated more often, Korubin Tools or Kontakapp?

Korubin Tools ships an update every 3 months, and Kontakapp every 5 days. Most recently, Korubin Tools was updated on October 24, 2026 and Kontakapp on October 25, 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.*