Field notes
Practical writing on reading signup-week cohorts, choosing return windows, and briefing stakeholders without overclaiming.
11 November 2025
How to read signup-week cohorts without overclaiming
A plain guide to comparing return rates across signup weeks, including the traps that appear when volumes are uneven.
7 January 2026
Choosing return windows that match how people use your application
Day-7 and Day-30 are habits, not laws. Here is how to pick intervals that reflect real revisit patterns.
18 February 2026
When cohort tables mislead: seasonality, releases, and quiet weeks
Three ordinary product events that bend cohort lines, and how to annotate them before you brief a stakeholder.
1 April 2026
Briefing leadership on retention without drowning them in tables
A structure for turning cohort findings into a short narrative that still respects uncertainty.