iDiscrete

For less than the price of a cup of coffee, iDiscrete is the most fully featured privacy application available for the iPhone. Rather than requiring a suspicious looking password, iDiscrete employs its patented Touch Sequence Protection™. This works by bringing up a nondescript “Loading” screen upon entry to the application, which registers touch input in 8 separate locations. The user has predefined their desired Touch Sequence, which can be as simple or as complicated as they wish.

Price: $2.99 – Download
Developer’s Website