TORQUE App for Fasters is a “must-have” for anyone designing critical mechanical joints or installing fasteners in an assembly environment. This application for iPhone smartphones pulls together all of the engineering data needed to calculate a tightening torque for all types of inch and metric fasteners in an easy to use app. It covers inch sizes from #0 through 4 inches and metric fastener sizes M1.6 through M64, sixty-one (61) inch fastener material grades, fifty-five (55) metric fastener property classes, and eighty-two (82) fastener finishes. Just select inch/metric, fastener size, fastener strength, and fastener finish, and click CALCULATE. No more digging through books, using a calculator, or worse, guessing at recommended fastener tightening values.