CalcKingFlywheel is a engineer‑friendly app for analyzing flywheel mechanics with speed and clarity. It brings core calculations—tangential, radial, and tensile stresses—together with outer‑radius constraints in a clean tabbed interface. Enter material properties, dimensions, and speed to instantly see results, safety margins, and critical limits. Designed for students, makers, and professionals alike, it emphasizes accuracy, readable outputs, and quick iteration during design trade‑offs. A built‑in Help section explains formulas, assumptions, and units to support learning and verification.CalcKingFlywheel works offline, making it ideal for shop floors, labs, and classrooms where reliable, on‑the‑go mechanical insights are essential.