ClassicBoy Pro vs RetroDECK

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.

RetroDECK is a free retro gaming platform for Linux handhelds, desktops, HTPCs and PC consoles. It packages emulators, engines, ports, clients, utilities and the ES-DE frontend in a preconfigured Flatpak environment. The RetroDECK Configurator handles file compression and management, BIOS validation, preset management and component tuning. Steam ROM Manager and ES-DE favorites integration let users add games to a Steam library, while Steam Input layouts support devices such as Steam Deck and external controllers. RetroDECK can connect to RetroAchievements, and PortMaster provides a continuously updated catalog of downloadable ports. Sandboxing isolates the package components. The software supports x86_64 Linux systems, including Steam Deck and Linux desktops. Games, proprietary BIOS files and firmware are not included, so users must provide legally obtained files where required. Save states and cheat support are available. RetroDECK is volunteer-run software; donations are optional and do not provide perks or early access. The plan costs nothing.