Apollo (which Goes By The Full Name Of X-plane Apollo) Is An iphone Game That Allows You To Simulate Landing The apollo 11 Aircraft On The Surface Of The Moon. It Is An Accelerometer-based Game, Which Means That You Have To Physically Tilt And Turn Your iphone To Guide Your virtual Shuttle Onto The Target, Landing It Safely On The Moon. Once You Get The Hang Of It, Using The Apollo Game On An iphone Isn't All That Difficult.