Use APKPure App
Get am i DRUNK? old version APK for Android
The app that gives you a rough idea. Not to be taken terribly seriously.
Take this simple reaction time test when you're sober. Then next time you've had a few and you're wondering quite how with it you are, whip it out again and re-take the test. It'll compare your score to your saved sober score and give you a rough idea of how your reaction times are affected. Great for happy hour!