Track what and when.
Tap below when you have a drink. It records the exact local time automatically. You can edit the details afterward.
Each tap adds 1 U.S. standard drink (14 g alcohol) at the time of the tap. Strong beer and generous pours may count as more than one.
Add a drink
Model-based BAC estimate
Enter your weight and physiology setting to enable the educational estimate.
Not a sobriety test. This is a rough calculation, not measured BAC. It can be too low, especially soon after a drink. Never use this number or a consumer breathalyzer to decide whether to drive.
Daily timeline
7 days
30 days
overall
Calendar.
Choose a day to see each drink and its logged time.
Colored dates contain drink records. An empty date does not mean zero drinks.
History.
Recorded days, newest first. Tap a day to view its timeline.
Profile & backup.
BAC estimate settings
Used only for a simplified calculation. These population averages do not describe everyone accurately.
The formula uses average alcohol distribution factors, not an individual's measured body composition.
Export & restore
All records stay in this phone or browser, not in Cloudflare. Back up before changing phones or clearing app storage. Updates on the same Cloudflare URL preserve local records.
About the estimate
One standard U.S. drink = 14 g ethanol. The simplified Widmark calculation assumes immediate absorption and an average clearance of 0.015 BAC percentage points per hour, so the estimate can be misleading before alcohol is fully absorbed or after eating, and individual rates vary. Untimed older entries are deliberately excluded rather than assigned imaginary times.
A device reading is stored as a separate observation. It does not automatically calibrate the estimate or verify a device's accuracy.
Alcohol-related impairment can occur at any displayed BAC. Do not use this app to assess driving or machinery safety.
Drink Log v2 • Free • No accounts • No ads • No tracking • Private on-device data