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Intoxication Calculator Playstore: https://play.google.com/store/apps/details?id=com.silencecm.IntoxicationCalculator
My first app released few days ago, developed in my spare time. My design skills are not very strong so I tried to stick with a basic material design.
The app calculates estimated blood alcohol percentage, time until sober, impairments and more. It works in real time based on the users time started providing on the fly calculations.