FunctionCalc is a very simple calculator that provides some additional functionality making it extremely powerful and yet very easy to use.

The additional functions include:
• The latest exchange rates for 171 currencies
• Performs mathematic operations on time-formatted numbers such as "3:15" 
• Direct conversions of units of measurement for categories such as currencies, weights, volumes, temperature etc.
• Pre-programmed complex mathematical formulas with text prompts for easier data input
• Eight pre-set customizable buttons which may be set to allow for one-tap access to the formulas and conversions that are used the most

FunctionCalc has been found to be especially beneficial for those traveling to foreign countries that use different monetary and measurement systems. Keeping the host country's currency and measurement conversions in the preset buttons allows for quick conversion to the user's own familiar units, even if the phone does not have Internet connectivity at that time.