Turn your smartphone into a high-performance alcohol screening device with the BACtrack Vio smartphone breathalyzer. It comes on a keychain, so you can carry it with you, and syncs with your smartphone over Bluetooth. Simply blow into the mouthpiece for five seconds to get a reading on your blood-alcohol concentration, as well as an estimate on when you can expect it to return to zero.
It's the most straightforward and portable way to keep an eye on your level of intoxication. Slip it in your pocket, your bag or keep it on your keychain, and next time you're thinking of driving home, check whether you're safe to do so using the BACtrack Vio smartphone breathalyzer, which is now only US$39.99 in the AndroidPIT Deals Store.