After having a few beers shot down , it is difficult to know when it is time to pass your keys to someone else . Started in 2008, the iBreath is a seriously useful accessories that tests your alcohol level on your iPhone .
All you have to do is place the device on the phone and have to be inhaled into the receptacle provided , it will measure your blood alcohol level .
Some applications provide an approximate alcohol level calculator, but this accessory is praised as much more efficient and accurate . Plus , it has an FM transmitter , so you can listen to the car radio drunk . Get it for just $ . 39