StudyAll's StudyCalc is a free, all-in-one educational tool designed to help students solve math and science problems. With over 25 different categories, this app offers a wide range of functions for students of all ages.

The app's arithmetic section includes tools for factoring numbers, adding, subtracting, multiplying, and dividing. The algebra section features tools for solving quadratic equations, simplifying fractions, and converting decimals to fractions, among others. The geometry section offers tools for calculating the area and perimeter of different shapes, as well as trigonometry functions. The app also includes a physics section with tools for calculating Ohm's law, power, and energy, as well as a chemistry section with tools for calculating the mass, volume, and density of substances.

One of the best things about StudyCalc is that it requires no internet connection, so students can use it anywhere, anytime. Additionally, the app is completely free, with no in-app purchases or subscriptions required. If you're looking for a comprehensive, easy-to-use tool for solving math and science problems, StudyCalc is a great choice.