Who are you kidding? Based on your late Saturday night statuses, your friends can already assume how much you’ve had to drink. The BACtrack Mobile Breathalyzer will just make it official. It goes a few steps beyond a standard portable breathalyzer by integrating some social features, as well as pairing up with your smartphone. It accurately tracks your blood alcohol level and plots it on a graph over time. You can see how drunk you’re getting, how fast and more importantly, when you’ll be back to an acceptable level for driving. Take pictures of your drinks, and a personal drinking diary lets you take notes of each as you go along.But wait, it gets worse: if you’re in the mood of sharing, you can set four levels of privacy, from private and personal, to fully social.