With Beer Tracker you can set limits for your alcohol consumption - not only for beer, but for all kinds of alcohol.
The base unit for that is the beer unit, which equals the amount of alcohol contained in one glass of Bavarian beer. The app calculates the amount of beer units for all drinks you log in it. This way, all alcoholic beverages are comparable.

You can also set, how much alcohol you want to limit yourself to. By default, this is one beer unit per day. The number of available beer units grows automatically every day, while every drink you have lowers the number.