Regla de Tres is a free calculator app developed by Gastry for Android users. This app allows you to calculate rules of three quickly and easily with just a press of a button. It also saves the history of your previous calculations for future reference.

This app is useful for a variety of purposes, such as calculating recipes for larger groups, determining the weights of a diet plan, or calculating how much you will collect during a sale. With its simple and intuitive user interface, Regla de Tres is perfect for anyone who needs to perform quick calculations on the go.