Apps needed -
Arduino Droid: Android - https://play.google.com/store/apps/details?id=name.antonsmirnov.android.arduinodroid2 Computer - https://www.arduino.cc/en/software
Bluetooth Terminal HC-05 - https://play.google.com/store/apps/details?id=project.bluetoothterminal&hl=en_IN&gl=US
Bluetooth RC Controller - https://play.google.com/store/apps/details?id=braulio.calle.bluetoothRCcontroller