Polar Sweep reinforces relationships between rectangular coordinates, polar coordinates, and basic trigonometry with a dynamic educational interface. Users can sweep through the circle to see changing values and helpful diagrams of right triangles for common angles.

Radians – as an introduction to radians this app shows decimal values, common PI fractions, and degree equivalents.

For a solid understanding of cartesian plane quadrants and polar coordinates, spend some time playing with this app.

Sidenote: At the point of posting this application has been marked as beeing freely available without costs. As this game is hosted with the AppStore the status might change. Authors like to publish their games for free for promotion purpose and then make it commercial. Also it could happen that the author decides to take the program down.

http://appshopper.com/education/polar-sweep