Real Ear Trainer vs FrankenSim

Play the songs you love — by ear. You don't need sheet music or years of theory to figure out the music in your head. Real Ear Trainer turns the songs you already listen to into quick, daily reps that train your ear to catch chords, melodies, and changes — until playing by ear just clicks. Drop in your own music and AI builds personalized exercises from the exact tracks you want to play. Start wherever you are — total beginner or seasoned player — and it adapts to your level, with progress tracking and feedback that show your ear getting sharper every day. 5 minutes a day. Then you're playing by ear. • Train on your own favorite songs, not generic drills • AI-generated quizzes from real music • Catch chords, intervals, and progressions by ear • Adapts to your level, beginner to advanced • Progress tracking + targeted feedback Stop reaching for tabs. Start hearing the music — and playing it back.

Carry a working numerical laboratory on your iPhone, iPad, or Mac. FrankenSim contains forty-three native experiments drawn from the FrankenSim Rust workspace. Each one runs a real local kernel and pairs the result with an interactive visualization and a concise account of what was computed. Explore heat diffusion, spectral waves, Lorenz dynamics, Gray-Scott reaction diffusion, fluid flow, smoke, topology optimization, signed-distance geometry, isosurfaces, Gaussian-process optimization, randomized linear algebra, symplectic orbits, computational geometry, interval-certified fractals, and more. The library is organized from foundations through deep experiments, end-to-end campaigns, and three larger flagships. Evidence labels distinguish a computed result from an illustration, approximation, bound, or certified conclusion. The theory atlas explains the equations and numerical ideas behind the displays. Every experiment runs on the device. FrankenSim has no account, advertising, tracking, cloud compute, or required network connection.