RP42

RP42 is an advanced calculator with a visible stack of type-aware cards, units that compose, and colors and matrices as first-class citizens. 290+ built-in functions — from finance and statistics to timecode, color spaces, and linear algebra — sit one tap away. Under the hood it's pure RPN: the discipline as old as the HP-35 and still the fastest way to compute. The surface is modern SwiftUI. THE STACK, MADE VISIBLE Every value on the stack is a card, and what's on the card depends on what's in your hand. Numbers render in real LaTeX for publication-quality look. Booleans get a colored pill. Integers wear a radix badge. Colors show their swatch. Vectors and matrices lay out in grids. Quantities carry their unit. Timecode keeps its frames. Tap any card for a typed detail sheet: chromaticity diagrams, matrix grids, property breakdowns. CARD CALCS — WHOLE PROBLEMS, ONE CARD Swipe past the…