StackCAS - RPN Calculator

StackCAS is an offline calculator for Android that combines an RPN stack workflow with exact symbolic math. It is designed for people who want a compact, keyboard-driven calculator for algebra, calculus, matrices, and complex numbers without giving up exact results. Features: - RPN stack-based workflow inspired by classic handheld calculators - exact math with symbolic and numeric workflows - exact symbolic algebra, simplification, and equation solving - calculus tools including symbolic differentiation and integration - matrix and vector calculations, including determinant, transpose, REF, eigenvectors, LU, and SVD - complex-number calculations - persistent stack, variables, and undo history - offline operation with no account, no ads, and no analytics