Plenty of people drink a bit of alcohol during the holidays. You wouldn’t want to make silly decisions like driving while drunk though. Drunkalyzer for iPhone is one of many apps you can use to avoid that. It visualizes your blood alcohol level and helps you stay in the appropriate range.
A variety of standard drinks are already available in the app but you can add custom drinks. You will be able to store blood alcohol and nutrition data in the Health app. The easy to read chart gives you an idea when you need to stop drinking.
[where to download it]