This application is a practical gadget. You can take your mobile phone as an angle and motion measuring instrument, and use the built-in acceleration, gyroscope and magnetic field sensor of the mobile phone to obtain the motion state of the object, including tilt angle, direction, motion acceleration, angular velocity, angle, magnetic field and quaternion. When in use, place the mobile phone on the object surface, open the software, select the observation and measurement you are interested in, and you can get the corresponding status information on the screen.