Adaptivity

Adaptivity is a macOS and iOS app that lets developers and designers instantly see how Apple’s size classes, layout margins, readable content guides, safe‑area guides, dynamic type styles, system colors, fonts, SF Symbols and materials appear on actual devices. It supports iPad multitasking, dark mode, right‑to‑left layouts, external displays and widget previews, making it an essential reference for building adaptive, accessible UI across Apple platforms.