Calculadora de Concreto is a free Android app developed by Soluciones RUVI. As the name suggests, it is a calculator that allows users to estimate the quantities of materials needed for concrete of different strengths. With this app, users can determine the amount of water, gravel, sand, and cement required for concrete with strengths of 100 kg/cm², 100 kg/cm², 200 kg/cm², and 250 kg/cm².

The app is user-friendly and easy to use. Users can enter the measurements of Width, Long, and High and click on calculate to get an estimate of the materials required. The app provides the calculation of materials in Boat Measures (of 19 Lts) or Volume (M3). It is important to take into account a slump of between 2.5 cm to 5 cm while using the app.