QuantumKit: Circuit Simulator

QuantumKit runs quantum circuits on this iPhone, iPad, or Mac. Compose with gates, edit OpenQASM, and simulate locally on Apple silicon — no cloud queue. Build on a visual canvas: tap or drag H, CNOT, Toffoli, and measure; insert in the middle; drop Bell, GHZ, and measure-all blocks. Switch to Code for OpenQASM; open and export .qasm. Run on Automatic, Metal, or CPU. Inspect shot histograms and export counts as CSV. Bundled samples include Bell, Toffoli, GHZ, Grover-style, teleport, and rotations. The same engine is the QuantumKit Swift package (Apache 2.0) for apps that import QuantumKit. This listing is the playground: local, noiseless statevector simulation. The canvas is built for small circuits; wide Metal runs are heavy by design. Keep Device on Automatic, start with Bell, then scale. For engineers, students, and researchers who want a circuit they can see, edit, and run on-device.