Unistat is a comprehensive stand-alone statistical analysis tool that can also work as Excel add-in. Many researchers prefer to use Excel to enter and handle their data, but are limited by its statistical and graphic shortcomings. Unistat 6.5 can help by offering a powerful statistical tool with little or no learning curve without ever having to leave Excel. The package offers power, ease-of-use and professional outputs. Unistat 6.5 runs on 32-bit and 64-bit Windows 7 / 8 and Windows XP. Unistat add-in runs on Excel 1997-2013, and 32-bit and 64-bit Excel 2010-2013.