If you think you had too much to drink, iphone is trying is help drivers before they take the wheel and drive. A new iphone apps called R-U-Buzzed developed by the Colorado State Department of Tourism where you can enter your weight, how long have you been drinking and how many drinks you had then you will get an estimated blood alcohol content and it tells you if you are safe to drive or not. This will allow you to determine your blood alcohol level. You can download this apps in your iphone for free.
The best reminder: Don't drink and drive. Always have a designated driver.