App shows digital compass sensor data in digital and analog format.May be used as a live wallpaper and standalone application.Few variants of the compass views, built-in and user-selected backgrounds.Additional arrow for saving a previous direction.Nice feature: ability to correctly showing arrow when the device is upside down.OpenGL ES 2.0 required.Some of functions (e.g. hiding ads) are only available when purchasing the full version. An application can be extended to the full version by in-app purchase. When you taking in-app purchases, you get lifetime access to the acquired functions, even if your phone changed or data is lost (google account needed).