StarTracker for iPhone 4S is out! Incredible fluid StarGazing experience at 60fps!iPhone 4 exclusive! Retina display, multitask and build-in gyroscope/digital compass enabled!It's so excited to introduce you the best 3D Sun and Moon Virtualization app on iPhone4!This is a virtual 3D compass sphere which shows the position of Sun and Moon in the sky with perfect application of virtual reality technology! Full utilization of the build-in gyroscope, digital compass and accelerometer drive the best user experience.With the cutting edge signal processing technique and combining the output of build-in gyroscope and digital compass, this app has fast reaction and high accruacy than any other similar applications.Features: - With iPhone 4, the build-in gyroscope will be fully utilized and combined with the accelerometer to give you a full position sensitive experience.- The 3D compass in a fantastic crystal ball will always point to the True North, no matter you rotate or position the phone in which direction.- You could see the current position of the Sun and Moon simultaneously on the 3D compass ball, and the 24-hour orbit of the Sun and Moon will be displayed as a circle surround the ball.- Display the time of Sun rise/set and moon rise/set.- Time and date can be adjusted smoothly, the position of Sun and Moon will move simultaneously with the changing of the date or time.- User can choose current location from a world map by trigger the top left location button.- Smooth motion flow and quick response which is realized by cutting edge signal processing technique.- Superb high quality graphic display by enabling the retina display of iPhone4 and full screen anti-aliasing technology employment.IMPORTANT: 3D Compass for iPhone4 using the build-in gyroscope of iPhone4 and not support other models.A wonderful experience you never had before!Just Go and Enjoy it!