JYRadarChart : Radar Chart for iOS
A radar chart (also known by various other names such as spider chart, star chart,web chart,cobweb chart, star plot, polar chart etc.) displays multivariate data in the form of a two-dimensional chart of multiple quantitative variables that are represented on axes starting from the same point. JYRadarChart is an open source radar chart implementation for iOS.
A demo app is included in the project repository and usage and customization instructions are available on the project page.