The purpose of this app is to calculate the blood alcohol content (BAC). To do this the formula of the Swedish chemist Erik Widmark was used. For the calculation you just have to enter the volume of the drink and the alcohol content. Furthermore, the app provides two different modes: a detailed and a fast mode. At the latter one the data input is limited to a minimum and precast drinks can be selected. However, because of this there may some inaccuracies. To calculate the exact blood alcohol content the detailed mode is recommended where even a graphical evaluation is provided.
You can find further information in the options menu.