In a basketball game, to shoot a ball accurately is the main aim of basketball players. This paper describes a smartphone application with Gyroscope and Accelerometer Sensors which was developed to help basketball players to practise their free throw shootings. Free throw is an important part of a basketball game which may determine the success of the team. The developed application is based on the theory of projectiles motion. The main advantage of this application is that it assist player to be consistentt in every free throw sessions without the help of a coach.