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Cohort retention

// last 8 weeks · cohort = first session
CohortSizeW0W1W2W3W4W5W6W7
2026-02-121,265100%68%49%34%24%16%10%8%
2026-02-191,219100%70%51%38%29%23%19%—
2026-02-261,188100%71%54%42%25%20%——
2026-03-051,088100%73%57%37%31%———
2026-03-12910100%74%50%41%————
2026-03-19865100%75%53%—————
2026-03-26917100%77%——————
2026-04-02747100%———————
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