RubyEverywhere gives a Rails (or Sinatra, or Hanami) app a native life on desktop, iOS, and Android. Desktop is a Tauri shell — in local mode the whole app is pressed into a single-file binary with Tebako and runs on-device with no Ruby install; in remote mode the shell wraps your deployed app. iOS and Android are Hotwire Native shells with a real tab bar, nav-bar buttons, menus, notifications, haptics, biometrics, and deep links. One config file, one CLI, one JavaScript bridge, with the web app staying the source of truth.