ECStudio is described as «set of powerful tools used for building electronic circuits, SPICE simulation, and calculation of circuits» and is a circuit simulator in the education & reference category. There are nine alternatives to ECStudio for a variety of platforms, including Android, Mac, Windows, Linux and Online / Web-based. The best alternative is Circuit JS, which is both free and Open Source. Other great apps like ECStudio are LTspice, iCircuit, Everycircuit and Circuit Builder.ECStudio alternatives are mainly Circuit Simulators but may also be Electronic Design Automation Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of ECStudio.