Abvy: BAC Calculator & Tracker

Abvy is a BAC calculator and alcohol tracker for people who enjoy a drink. Log your pints as you go and see when you'll be sober again - tonight, and tomorrow morning.

TONIGHT, AT A GLANCE
- A live chart of your estimated blood alcohol (BAC), with an honest range around every number
- Your projected peak, your personal limit and your estimated sober time, before you get the next round in
- Two-tap logging for pints, halves, wine, spirits and cocktails, with UK measures and your own custom drinks
- Evening sessions with gentle water reminders and a wind-down mode for the last hour
- Home-screen widgets and an ongoing notification, so you can keep count 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 drinking, measured in grams of pure alcohol
- Session habits: your usual pace, your peaks, and how often you stay under your own limit
- What you actually drink, broken down by drink and by source
- Optional calibration with your own breathalyser readings

DECEMBER, AND TOMORROW MORNING
Third party of the week, four pints in, and the only question that matters is how you'll feel at eight in the morning. Abvy answers it the one honest way it can: as an estimate, with the range around it, while there is still time to do something about it.

THE SCIENCE
Abvy runs a physiological model from the clinical literature (a one-compartment pharmacokinetic model), personalised 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 judgement. 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-off 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