Alcophone estimates your blood alcohol content with peer-reviewed body-composition models (Norberg/Deurenberg, 2003) instead of the 1932 Widmark formula most apps still use — which can underestimate BAC by up to 25%. Log from 5,800+ real drinks with real ABV and serving sizes, factor in meals and water, see exactly when you'll be sober, and check the legal limit for your state or country. The moment your BAC is above zero, a rideshare button is on screen. No account, no server, works offline.