Growth & Cohorts
DAU
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WAU
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MAU
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DAU/MAU stickiness
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30-day funnel
Cohort retention — signup week × week offset
Cell value: % of cohort active in that week-offset (0 = signup week, N = N weeks later).
Anomaly alarms
Anomaly emitter Lambda + CloudWatch Anomaly Detector (2σ band on GeoClear/Growth/CallsPer5Min) ships in Q-544-anomaly follow-up.