何杯飲んだっけ？

A counter that lets you track the number of drinks and estimate pure alcohol content during drinking sessions. Simply press the button for each alcoholic beverage you consume, and it automatically counts your drinks and calculates the estimated pure alcohol amount. Records are saved only in your browser on the device you're using—nothing is sent to any server.

Features:

• Record popular drinks like draft beer, highballs, and sake with a single tap
• Automatically calculates estimated pure alcohol content using the formula: volume (ml) × alcohol percentage (%) × 0.8 ÷ 100
• Displays elapsed time, drinking pace per hour, and remaining amount until your set limit
• Undo mistaken taps with the "back" button, or add drinks not on the preset list using "custom"
• When you finish and save, review your daily totals and consumption trends for the day in graph form
• A web app that requires no installation. Records are saved only on your device and never sent externally

Please note: The pure alcohol content is an estimate only. Do not use this for health assessments or to determine whether you're fit to drive.

Introduction page and production notes:
https://jisaku.net/apps/drink-session-counter/