Can you pinpoint the one that's one too many? There's an app for that. Well, an app and a plug-in breathalyser. Bactrack will allow you to measure how much alcohol is in your bloodstream. This piece of kit connects to your iPhone or iPad via Bluetooth, sending all your information directly to an app so you can not only get a reading of your level of intoxication, but also some real life descriptions of exactly what is going on as a result – drink-dialing your boss, maybe; a massive rise in ridiculous behaviour; or a slight rise in aggression levels.

bactrack.com