Egg NS is an Android-based Nintendo Switch emulator developed by a Chinese team. Unlike PC emulators like Yuzu or Ryujinx, Egg NS is designed specifically for ARM-based mobile devices. It allows users to run commercial Switch games (ROMs/XCI/NSP files) directly on smartphones and tablets.

The Egg NS Emulator is developed by a team of volunteers and contributors, who work together to improve the emulator and add new features. The development process is open and transparent, with all code changes and discussions taking place on GitHub. The emulator is written in C++ and uses a variety of libraries and frameworks, including SDL and OpenGL.

However, Egg NS has been controversial due to its business model and code origins. Unlike open-source emulators, Egg NS is proprietary and requires either a paid subscription or a specific physical gamepad to unlock full speed.