My Boy! emulator can be available in both versions full and free. Whatever may be device high-end or low-end the emulator always delivers good FPS. No bugs and its battery friendly too.

Link cable emulation either on the same device, or across devices via Bluetooth or Wi-Fi, running at decent speed. Gyroscope/tilt/solar sensor and Rumble emulation. Controls are easy and intuitive, and features like hardware button mapping and onscreen button layout changing. No need to use BIOS as in some emulators. In-built IPS/UPS ROM patching.