OmniCalc

Easy to use calculator that lets you scroll through your operations and make changes with instant results.

Includes date math functions to easily add or subtract dates from each other. You can also add or subtract days from any date.

• Rotate the iPhone/iPad to instantly swap between different calculators.

• Annotate and save a series of operations to create your own conversion calculators.

• Save formulas or operation history in your own math library.

• Date Math is automatically detected in normal operations. Add or subtract dates from each other, add or subtract a number from any date.

Includes:
• Standard Calculator Functions
• Scientific Calculator Functions
• Statistical Calculator Functions
• Date Math Calculator Functions