ClassicBoy Pro vs ROCKNIX

ClassicBoy Pro is an Android emulator for retro games, with a ROM scanner and game database. Its maker describes about twenty built-in emulation cores for systems including PlayStation, Nintendo 64, Game Boy, NES, Super NES, Sega systems, arcade games, and Atari 2600. External plugins extend support to systems such as Nintendo DS, MAME, Sega Saturn, and PC Engine/CD. The app can scan selected files or directories to identify games for a browsable library, where users can locate or favorite them. Controls include touchscreen buttons, external gamepads, customizable layouts, gestures, and accelerometer input; the maker lists gesture and sensor controls as premium features. Other listed tools include adjustable game speed, cheat codes, save and load states, and game-data import and export. Wireless controllers can connect over Bluetooth. The free version includes on-screen buttons and gamepad mapping. The app is listed for Android and Windows through Google Play Games, but the listing does not show in-app purchase prices. It does not include ROMs, and users must have the right to play each ROM.

ROCKNIX is a free, immutable Linux distribution for handheld gaming devices, focused on retro gaming emulation. Installation means downloading a device image, flashing it to an SD card or internal storage, then booting the device. It supports local and remote multiplayer, save states, video filters, in-game touch controls on supported devices, and custom performance and power profiles. Bluetooth audio and controller connections, HDMI and USB audio/video output, and music and video playback are also included. Cloud and LAN synchronization are available through Syncthing and rclone; built-in VPN support covers WireGuard, Tailscale and ZeroTier. ROCKNIX integrates RetroAchievements and automatic game scraping. Achievement support varies by emulator and game and requires an internet connection. Steam and Heroic Games Launcher are supported on arm64. Updates can be installed over the air from EmulationStation or manually with an update tar file. There is no formal support; the project is provided as-is through community help channels. Supported devices are listed in the wiki, and adding a device requires contributed work and direct access to it.