Ballista: Ballistic Calculator

Ballista is a field-first ballistic calculator for hunters and range shooters. One screen. One combo — rifle, optic, and load together. No signal required. Pick a factory load or enter a BC, set sight height and zero, then dial elevation and wind in MIL or MOA. Wind is a 12-hour clock. Atmosphere is station pressure or density altitude, not a hidden ICAO default. • 3-DOF G1/G7 point-mass solver (RK4) • Imperial and metric — numbers convert, they are not relabeled • Offline bullet library with factory catalog MV from a test barrel • Live wind bracket and transonic range on the shot screen • Chronograph and live-shot truing • Printable 3×5 in DOPE card, CSV, and local backup