New Suspension Calculations: - Angle Corrected Spring Rate - Stacked Spring Rate Age rating update required by Apple.

New Drivetrain Calculation: - RPM (from speed, axle gear ratio, transmission gear ratio, and tire diameter) New Engine Calculations: - Valve Spring Open Pressure - Valve Spring Rate Fixed an issue in the Unit Converter where Weight was not being shown as an option.

Dark mode support. New Drivetrain section that includes: - Axle Speed - Driveshaft Critical Speed - Gear Ratio - Rear Wheel Torque - RPM After Shift New Engine Calculations: - Deck Height Clearance - Valve Curtain Area New Density category in Unit Converter.

Modernized user interface. New engine calculation: Supercharger Temperature Gain. Additional information provided for: - Brake Mean Effective Pressure - Effective Drive Ratio - Equivalent Drive Ratio - Power Loss at Elevation

Four new calculations: - Aerodynamic Lift-Induced Drag - Injector Flow Rate - Port Velocity - Wheel Rate Additional information provided for: - Combustion Chamber Volume - Piston Speed - Tire Size Supports larger 4-inch screen on iPhone 5 and iPod touch. Other minor enhancements and internal improvements.

Two new engine calculations: - Optimum Intake Runner Size - Peak Torque RPM Now includes a unit converter! Added a tire speed rating chart. Fixed an issue with iOS 5.