Dreisatz is a free Android application developed by Joerg Pichler under the Utilities & Tools category. It is a simple rule of three calculator that allows users to add multiple rows to calculate the output. The app also includes the ability to save and load configurations.

The main purpose of this app is to recalculate cooking recipes for a different amount of ingredients. The developer created this app for personal use, but it is now available for everyone to use. However, it should be noted that this app is provided as-is without any warranty.

Overall, Dreisatz is a useful app for those who need a quick and easy way to calculate proportions for cooking or any other purpose. If you have any suggestions for the developer to improve the app, they encourage you to reach out to them.