Calsee is a free calculator for iPhone, iPad and Android that generates a new theme every time you swipe: Liquid Glass, Neo-brutalism, Cyberpunk, Paper & ink and more. It's also built for everyone: hold any key to learn what it does, switch to a left-handed layout, and every theme is contrast-checked, with a 7:1 accessible mode. History with search, notes and CSV export, and the amount in words under every result. No ads, no account, no tracking.