Great
Effective and easy. Nice for a ballpark estimate
Yes, BAC Buddy is completely free and it doesn't have any in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
BAC Buddy is free.
To get estimated revenue of BAC Buddy app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
Effective and easy. Nice for a ballpark estimate
To calculate your BAC it asks for #beers. No mention of alcohol content or size. Beer can be anywhere from 3% to 12+%. No way this is going to be more than a wild guess for your BAC.