Cycada (formerly known as Cider) is a compatibility layer that aims to allow applications designed for iOS to run unmodified on the Android operating system. The method uses compile-time adaptation to run unmodified code with minimal implementation effort. The project was revealed in a conference paper by computer science researchers at Columbia University. The project enables iOS applications to adapt to Android's kernel and programming libraries. Unlike many other compatibility layers (such as WINE or Darling), Cycada works at the kernel level, as opposed to at user space.