Here is a lightweight, smart breathalyzer that shows your BAC, so you can make smarter decisions. WearSmith has an OLED display to display results right way. Just blow into the device for a few seconds to get started. The app analyzes your data and lets you know how long it will take you to recover.
WearSmith is portable enough to fit in your pocket easily. It is compatible with iOS and Android devices. You can support this project on Indiegogo.