Ultimate Desk Calculator Pro app for iPhone and iPad

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 tax and exchange calculator. It follows all the conventions of an office calculator and uses infinite precision arithmetic internally and displays to 50 digits. 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.
- 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.
- 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. Just like a standard office calculator
- 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.