Think you’ve got what it takes to challenge the professional arm wrestlers on AMC’s Game of Arms? One quick way to find out is with the new Arm Yourself App for iPhone and Android. Download the app, then shake your phone as hard as you can for 15 seconds. The strength of your shake will determine a virtual bicep which you can graft on to a selfie and share with your friends. Some will be contenders. Others will be legends. The time has come to flex.