ECStudio is described as 'Set of powerful tools used for building electronic circuits, SPICE simulation, and calculation of circuits. These tools are complemented by the information center containing resources, connector pinouts and short (20 pages) interactive book explaining basic' and is a circuit simulator in the education & reference category. There are more than 10 alternatives to ECStudio for a variety of platforms, including Android, Mac, Windows, Web-based and Linux apps. The best ECStudio alternative is Circuit JS, which is both free and Open Source. Other great apps like ECStudio are LTspice, Everycircuit, iCircuit and VoltSim.