• Larger buttons in simple mode
• Logarithmic, trigonometric and hyperbolic functions with inverse counterparts in scientific mode
• Modes for radians and degrees
• Angle conversion between radians and degrees with mode switch
• 10 memory slots in scientific mode
• Awareness of operation priority
• Gentle haptic feedback from buttons
• Support for both portrait and landscape orientations

UPD to 0.1.1 as of 28.12.2011:

• Fixed inconsistent history behaviour
• “deg to rad” and “rad to deg” are now correct in history

Source N9 Apps