Be Flash

Be Flash is a gear-design bench that fits in your pocket. Place gears on a canvas, mesh them together, and share shafts to build simple, idler, or compound gear trains. Output RPM, speed ratio, reduction factor, and rotation direction update as you work, and every calculation happens on your device. - Live gear workbench. Arrange gears on an animated canvas, connect external meshes, or lock gears to a common shaft for compound stages. Speed, direction, and status readouts update instantly, with full undo and redo as you experiment. - Target tooth-count solver. Enter the output speed, speed ratio, or reduction you need and the solver enumerates integer tooth counts that hit it, ranking exact matches first and listing close matches with their error. Preview a candidate on your train before applying it. - Stage comparison. Hold the input speed constant and compare your current train against a saved variant to see overall factor, direction, and warnings side by side. - Saved train library. Designs persist in an on-device database with search, sorting, renaming, duplication, and deletion. Starter kits are included so you always have a working example to open and modify. - Quick two-gear calculator. Get an instant readout from the home screen for fast sanity checks without building a full train. - Offline reference and samples. Formula references, idler and compound demos, editable sample drafts, and animation preferences all work without a connection. Whether you are choosing a reduction for a robot drivetrain, printing a gearbox, repairing a machine, or learning how gear ratios behave, Be Flash gives you the numbers without a spreadsheet. Ideal rigid spur-gear math is handled cleanly: signed speeds, direction reversals, idlers, and compound stages are all covered. No accounts, ads, analytics, camera, microphone, location, or media access. Your gear trains and settings stay in local storage, and the app works fully offline.