DrinkTracker - The Breathalyser iPhone App Use your iPhone or iPod Touch to keep track of your BAC (Blood Alcohol Content) while you’re drinking with the DrinkTracker personal breathalyser calculator app. Australian made and australian owned! Quickly and easily keep a record of what you’ve been drinking with the fully editable one-tap drinks list. Even add your own favourite drinks to the drinks list and sort it into any order you want.