This New iPhone Calculator May Be 200-Percent Faster to Use Than a Normal CalculatorJesus Diaz3/15/12 10:40am108EditPromoteGo to permalink This is Rechner, a new app for iOS. It's a calculator, but not an ordinary one. For one, it's prettier and much simpler. But, most importantly, it's fully gestural, designed for a touchscreen. According to its creators, it's 200% more efficient than a regular calculator.