An apple a day might keep the doctor away, but an Apple device on your wrist could replace them altogether. Well, sort of. The Apple Watch is already chock-full of health-focused applications, but according to a recent report from Mark Gurman, an app for testing blood sugar levels is in development. Apple has always been good at keeping a lid on its projects, but that approach has reached the next level with this app. Multiple layers of non-disclosure agreements and vetting were required before anyone could participate in the employee-only…
