Use APKPure App
Get Bluetooth nrf51 Remote Control old version APK for Android
OLED 디스플레이 NRF51 DK 보드에 기초하여 블루투스 LE 원격 제어 명령
Bluetooth Low Energy remote control is based on Nordic Semiconductor NRF51 DK board with an Adafruit shield featuring an OLED LCD 1.8'' screen with a joystick.
Full description of this project is located here : https://github.com/bertrandmartel/bluetooth-remote-control