Amplitude × Calm
Amplitude x Calm, discovering a hidden retention hook
3x increase in retention
Guessing at retention drivers to confirmed causal insight
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Why it works
The story earns its Clarity tag because the core win is not simply a number going up but the moment Calm moved from a hunch to a confirmed causal finding. The behavioral cohort analysis and subsequent experiment are the mechanism, and the narrative walks through the logic of correlation versus causation, which makes the insight feel credible rather than cherry-picked. The competitive switch from Mixpanel is explicit and named, adding a sharp before-state: Calm was under-tracking because the cost model punished curiosity.
Steal this
Show the experiment that proved causation, not just the correlation. Walking readers through 'we saw a signal, we tested it, and the test confirmed it' builds far more trust in the headline metric than a bare before-and-after number.
Click to enlarge ↗ This is editorial commentary and curation. The case study, screenshot, and all metrics are Amplitude's published work; we link to the source and lead with our analysis.