KATER ZERRO logo Kater Zerro — Drinking, but with Charts.
Whoop, whoop. KATER ZERRO is now available on the App Store.

Find patterns in your drinking

KATER ZERRO trend reports for drinking by season and day

A list of drinks becomes more useful when you can step back from it. KATER ZERRO turns your entries into trends across short windows, a full year or everything you have recorded.

Daily averages include days without alcohol, while the total shows the sum of the drinks you logged. This keeps a week, a month and a partly finished period comparable instead of making a busy weekend look like an entire month.

Look beyond the main chart to see drink types, weekdays, months, seasons and dry phases. Each view uses the same selected period, so the patterns all refer to the same part of your history.

If you set a personal limit, a reference line can sit alongside the trend. The point is not to deliver a verdict; it is to help you notice what is changing and decide for yourself what you want to do with that information.