# Kemmler vs OptiAufmaß

The clearest difference is price: Kemmler at Free against OptiAufmaß's $299.99. OptiAufmaß's advantage is iOS requirement (8.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Kemmler is free to download; OptiAufmaß costs $299.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kemmler ships an update every 2 months, OptiAufmaß every 3 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Kemmler | OptiAufmaß |
| --- | --- | --- |
| Price | **Free** | $299.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 66 MB | 6 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Kemmler Baustoffe GmbH](https://appshunter.io/developer/1458751304) | [Friedhelm Beseke](https://appshunter.io/developer/1041921872) |

## What reviewers say

### Kemmler

[App page](https://appshunter.io/ios/app/kemmler/id867567143)

**Features:** macOS Compatibility

**In-app purchases:** none


### OptiAufmaß

[App page](https://appshunter.io/ios/app/optiaufma/id1041921873)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kemmler free?

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

### Is OptiAufmaß free?

OptiAufmaß costs $299.99, with no in-app purchases.

### Do Kemmler or OptiAufmaß have ads?

Neither Kemmler nor OptiAufmaß shows ads.

### Which is updated more often, Kemmler or OptiAufmaß?

Kemmler ships an update every 2 months, and OptiAufmaß every 3 months. Most recently, Kemmler was updated on October 6, 2026 and OptiAufmaß on October 7, 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.*