Polar Calculus Phone Cases - iPhone and Android

Description: Polar Calculus merges polar-style mapping, moon phases, mathematical symmetry, and astronomical detail into a refined monochrome artwork. It feels both scientific and artistic, making it a strong fit for people who enjoy maps, coordinates, astronomy, and geometric structure.

Description: A science and mathematics visual featuring a differential equation, 'v dv/dx = -ω²x', above a graph of a sine wave with axes labeled 'y', '+A', '-A', '0', 'π/2', 'π', '3π/2', '2π', and 'ωt x'. To the right is a polar coordinate grid with concentric circles and radial lines, showing a segment of a circle and the label 'ωt'. The entire composition is in white on a black background.