Am iDrunk? It’s a question that rains down during the holiday party season, especially with New Year’s Eve just a couple of days away. Checking your sobriety is now just a reach away to an iPhone. A number of downloadable iPhone applications, or “apps,” are ready to test your sobriety through blood-alcohol calculators and balance tests. How effective are these in gauging your potentially drunken self, and how easy are they to use? To find out, I volunteered my liver and sipping skills to test four iPhone sobriety apps.