Scientific Calculator He-580 is a free Android app developed by HiEdu for education and reference purposes. The app offers a wide range of features, including a scientific calculator, standard calculator, math and physics formulas, graphing calculator, equation solver, and unit converter.

The scientific calculator supports most of the features of real calculators, with Natural Display that allows input and display of fractions and certain functions just as they are written in textbooks. The app also includes an undo feature and the ability to save and edit history and favorite calculations.

In addition to the calculator, the app includes over 1000 math formulas and popular as well as advanced physics formulas in seven categories. The chemical reaction feature allows users to discover chemical reactions and solve equations with one or several unknown variables.

The app also includes a converter for various units such as currency, temperature, length, mass/weight, speed, and more. The layout of the buttons is scientifically rigorous, and there are many beautiful themes with different styles to choose from.

Overall, Scientific Calculator He-580 is a comprehensive and useful tool for students, professionals, and anyone who needs quick access to math and physics formulas, unit conversions, and a reliable calculator.