NewtonianMechanics app for iPhone and iPad

This is a 3D simulator of Newtonian mechanics.
According to the equations of motion and the universal law of gravitation, you set the attributes of a celestial body such as mass, radius, position, and velocity, and the subsequent motion of the body is simulated.
Samples are provided for immediate simulation.
The samples include Sun and Earth,Black Holes and Small Bodies, GPS, and Geostationary Satellites.
Samples can also be modified and saved.
This means that users can create new celestial mechanics shows.
In the home window, select your favorite sample and press Universe.