ClassicBoy Pro vs jgenesis

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.

jgenesis is a free, cross-platform emulator for 8-bit and 16-bit consoles. It supports Sega Genesis/Mega Drive, Sega CD, Sega 32X, SG-1000, Master System, Game Gear, NES, SNES, Game Boy, Game Boy Color, Game Boy Advance, and PC Engine/TurboGrafx-16. Save states, fast forward, rewind, and optional CPU overclocking are available on some systems. Expansion support includes Master System FM sound, the Genesis SVP chip, common NES mappers, and most SNES coprocessors. Its GPU renderer offers integer prescaling, optional linear interpolation, configurable pixel aspect ratios, blur, and anti-dither shaders. Keyboard and DirectInput gamepads are supported, including three-button and six-button Genesis controllers. Published builds require a 64-bit x86 CPU with SSE4.2 and a GPU supporting Vulkan, or DirectX 12 on Windows 10 and later. The project estimates about 300 MB of RAM for default settings. Releases come through GitHub, while commit builds remain available for 90 days and may be buggy.