title: How can I programmatically check if an app is running in TestFlight beta mode?
body: <p>Is there a way to programmatically determine if the installed version of an iOS came from TestFlight (beta) or production (App Store)? To simplify testing of in-app purchases, I'd like to disable the entire store flow for beta testers.</p>
  
  <p>Bonus points for providing the answer in both Objective-C and Swift.</p>