TinyComputer's Ballistics Engine is a sophisticated iOS app that provides precision trajectory calculations for long-range shooting enthusiasts and professionals. Built on an open-source Rust ballistics library accessible at https://ballistics.rs/, the app features a comprehensive trajectory calculator that models six state variables throughout projectile flight, incorporating multiple drag models (G1, G7), atmospheric effects, Coriolis force, spin drift, and wind deflection. The app offers two main calculation modes: a standard trajectory calculator for single-shot analysis and a Monte Carlo simulation tab that runs thousands of simulations with statistical variations to predict impact probability and dispersion patterns. Users can input detailed bullet specifications including caliber, weight, ballistic coefficient, and muzzle velocity, along with environmental conditions such as temperature, altitude, and wind parameters.