With alcootest application you can estimate your blood alcoholic concentration after a party!
Enter the number of glasses (bier, wine or spirit) you have drunk and alcootest will estimate your BAC according to your gender and weight.
You then know your current BAC and when it will go below 0.5 g/l (0.05%) to be able to drive in most countries.
Contrary to most other BAC applications, this one takes into account the time of drinks and if you have eaten or not, leading to a more precise estimation.

Important notice: The application only give a rough estimate of your blood alcoholic concentration, it cannot be 100% accurate.