Eclipse vs gbajs3

Eclipse is a web-based emulator for playing games from classic systems: Game Boy, Game Boy Color, Game Boy Advance, NES, SNES, Sega Master System, and Sega Game Gear. It is available on Android, iOS, and web, with a free plan. Games can be added from Google Drive, Dropbox, or the Homebrew selection, or loaded from local files. The interface supports touch, keyboard, and controllers, with editable default bindings; controller compatibility depends on the JavaScript Gamepad API and the operating system. Once the site is cached, uploaded local games can be played offline, although some features, including the Library, are disabled. Save behavior differs by system: NES games do not save, SNES and GB/GBC games should save, and GBA games have some incompatibilities. The GBA core lacks Real Time Clock support, and most GBA games with auto-save functionality are unsupported. Eclipse has no multiplayer features, including Pokémon trading. User data is stored locally on the device.

gbajs3 is a free, browser-based Game Boy Advance emulator for modern browsers, with no plugins required. It offers interchangeable mGBA WebAssembly and pure JavaScript gbajs cores. Both cores support a realtime clock. Controls include remappable keyboard bindings and virtual controls for desktop and mobile, alongside mobile interface support and offline progressive web app support. Fast forward is included. Save states and cheat codes work with the mGBA core, while a surface-level assembly debugger is available with the gbajs core. The project also lists a Go server for logged-in users, an Nginx server for content, an admin interface and PostgreSQL support. Self-hosting uses an environment file and Docker Compose. The setup guide says the default admin password is admin and instructs changing it after login. The README marks debugger and server enhancements as unfinished, and GitHub lists no releases.