ANDSemu vs SkyEmu

ANDSemu is a free, open-source Nintendo DS emulator for Android phones and tablets. It provides a streamlined graphical interface for running Nintendo DS games, with portrait stacked, landscape side-by-side and landscape stacked screen layouts, plus LCD swapping. Save states and cheat support are included. The project describes its code as based on nds4droid and DeSmuME, and also names DSdroid in the repository. ANDSemu is licensed under GPLv3; redistribution, forks and selling a fork require compliance with that licence, including source files and build scripts. The README recommends Google Play installation and gives source compilation as an alternative. However, AppBrain reports that the app was removed from Google Play on January 14, 2013. Its historical listing describes a free download requiring Android 2.3.3 or later. Source builds require ActionBarSherlock, Android Support Libraries and ndk-build for DeSmuME and other native libraries.

SkyEmu is a free emulator for Game Boy, Game Boy Color, Game Boy Advance, and Nintendo DS systems. It runs on Android, iOS, Linux, macOS, web, and Windows, and can load ROMs compressed in ZIP archives. Graphics options include upscaling shaders, color correction, and screen ghosting. Controls include game controllers, rumble, configurable keybinds, and mobile on-screen controls. Four persistent save-state slots include screenshot previews. A REST-like API supports asynchronous scripting and automation, and listed integrations include Retro Achievements, a RetroArch/libretro core, and Google Drive save-state sync. The web app runs locally using WebAssembly and JavaScript, keeping files on the user's machine; its service worker enables offline use on more platforms. The project describes its focus as preserving these systems for future generations while providing a good user experience. It says Game Boy Advance emulation is significantly more accurate than its Game Boy and Game Boy Color emulation. Many Nintendo DS games still have mild graphics and audio issues, and DS emulation is beta quality.