Get the Pro version for more features (see version info for details), ad free, no pop ups, priority technical support. Ultimate Desk Calc is a full featured desk calculator. It follows all the conventions of an office calculator and uses infinite precision arithmetic. Also has large easy to read display and big buttons. - In infinite precision mode there are no rounding errors. - Decimal place selector. Set the number of decimal places displayed from 0 to 50 digits. - Rounding selector. Instead of infinite precision, Ultimate Desk Calc can also use standard rounding modes, round down, round 5/4, ADD2. - Grand Total (GT) feature keeps a running total. - ADD2 mode allow quicker entry of currency values. - 4 key memory. Memory plus, memory subtract, mem remember, mem clear. - TAX calculation gives the price plus/minus tax and the tax amount according to a pre-set tax rate. - Currency calculation. Convert from local to foreign currency according to a pre-set exchange rate. - Percentage key. - Square Root key. Accurate to about 30 digits. - In-app help assistant.- Copy and paste values from Ultimate Desk Calculator to other apps. Paste values into the UDC display.