Patrick Pijnappel & Niels Andriesse
Archimedes is one of the first calculators to feature an inbuilt formula library. It's as simple as picking a formula and filling in the variables. The answer is calculated automatically, and even units are fully supported.
Intersecting, integrating and finding derivatives should be intuitive and straightforward. Archimedes lets you interact directly with plots and makes it all as easy as dragging your fingers across the screen.
Archimedes is backed by a powerful mathematical engine. Equations are solved automatically and can be shown in both exact and numeric form, and even systems of equations are supported.