PencilMath
Retention Field Notes
Chapter 03
Slide 12
Retention does not break; it evaporates.
Six-month cohort behavior after the first saved theorem, note, or shared graph.
Reader return rate by month after signup
A single line chart shows return rate fading from 76 percent in month one to 21 percent in month six, with month two highlighted as the point where reasons to return begin to matter.
80%
60%
40%
20%
M1
M2
M3
M4
M5
M6
M7
76%
21%
the joke gets old here
user looking for a reason
monthly return rate
This is the
xkcd Stick Figure Comic (2005)
design system, applied by
Curio Design
— a design-style library for AI agents. Full xkcd Stick Figure Comic (2005) guide →
designbycurio.com/learn/xkcd-stick-figure-comic-2005