Seven-day windows are not a vanity metric — until they are
Day-7 earns its keep only when acquisition stamps and product events share a clock. Otherwise it is a slogan with a percentage sign.
Journal
Notes we still argue with after class.
These essays are written for people already sitting on a retention number. They are not a newsletter of tips. Each piece ties back to work we do in the atelier.
Build the cohort table before you commission the dashboard
Most Bangkok product rooms we visit already have a chart. Few have a written window policy. The table comes first.
Thailand seasonality is not a footnote on a Day-14
Songkran and year-end commerce will wreck a naive window. Annotate the calendar before you rewrite the product story.
When n-day retention misleads the product meeting
A single n-day number can hide a clock-start fight, a paywall mix-up, and a holiday. Here is how we unpick it in critique.