This app is dedicated to be used as joystick interface for Arduino-based (not limited to) robotic application. It can be connected to the hardware using Bluetooth communication modules such as HC-05 or Bluetooth Bee. The serial output is in mathematical formula set for differential and Omnidirectional drive robot wheel configuration with adjustable headers (accessible through Settings Menu). You however can set the output to be raw x and y value through the ''Raw/Formula Output Mode'' menu and return back to the formula mode at your convenience using the same menu. Other than that, you can also get the raw form of magnitude and angle of the joystick based on its current direction and angle. There are 6 buttons on board which you can easily set the text they send via serial output using the Settings Menu. The appropriate Arduino program or sketch needs to be used in order to parse the serial string sent by this app which you can easily build one yourselves. You can contact me through email if you need the sample Arduino code. Any problem please don't be hesitate to contact me through email. Thank you.