Calculator Toolbox is... well... a calculator app for your Windows Phone. And to call it a calculator app is a mild understatement.
Beyond doing your basic arithmetic Calculator Toolbox throws in six categories that hold thirty four calculators. There are two versions of Calculator Toolbox for you to choose from. A freebie version that has ads and an ad free version that is running $.99. If you need more than your basic calculator, Calculator Toolbox is worth checking out.