Abvy: BAC Calculator & Tracker

Abvy is a BAC calculator and alcohol tracker for people who enjoy drinking and want to stay on top of it. Log what you drink in seconds and watch a live estimate of your blood alcohol content (BAC) unfold: where you are right now, where the night is heading, and when you'll be sober again.

TONIGHT, AT A GLANCE
- A live BAC chart with an honest uncertainty range - every number is marked as the estimate it is
- Your projected peak, your personal limit, and your estimated sober time, before you order the next round
- A fast drink counter: log beer, wine, spirits and cocktails in two taps, with regional serving sizes and your own custom drinks
- Evening sessions with gentle water reminders and a wind-down mode for the tail end of the night
- Home-screen widgets and an ongoing notification, so you can track your drinking without opening the app
- A Wear OS companion app with a tile and a watch-face complication: check your estimate and log a drink from your wrist

UNDERSTAND YOUR DRINKING HABITS
- A weekly picture of your alcohol consumption, measured in grams of pure alcohol
- Session habits: your typical pace, peaks, and how often you stay under your own limit
- Drink-of-choice and alcohol-by-source breakdowns
- Optional calibration with your own breathalyzer readings

THE SCIENCE
Abvy's BAC calculator runs a physiological model from the clinical literature (a one-compartment pharmacokinetic model), personalized to your sex, weight, height, age and stomach state. It never pretends to be more precise than it is: the "~" in front of every number means estimate, and the band around the curve shows how far off it could be.

YOUR DATA STAYS YOURS
Your drinks live on your device. No account, no feed, no judgment. Export your drinks as CSV any time. Anonymous usage and crash statistics help us fix bugs; what you drink stays on your devices unless you choose to share it.

SUBSCRIPTION
Using Abvy requires a subscription (monthly, or yearly with a free trial for new subscribers) or a one-time lifetime purchase.

IMPORTANT
Abvy cannot measure your actual blood alcohol - no phone can. Estimates can be wrong, and no reading from any app or device means it is safe to drive. Never use Abvy to decide whether to drive or operate machinery. Abvy is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. If you have concerns about your drinking, talk to a healthcare professional.

CREDITS
Device mockup by DeviceFrames.com

Recent changes:
The example evening at the end of setup now fits neatly on screen in every language. Plus small fixes. Ideas or problems? Write to support@abvy.app or use Settings → Feedback.