Use HEART to Keep the North Star Human
Use HEART categories to test whether a metric covers user-centered quality, not only growth.
Growth metrics need a user-experience conscience. HEART as a Lens HEART helps teams ask whether the metric reflects happiness, engagement, adoption, retention, or task success. North Star metrics often emphasize engagement or retention, but durable products also need task success and satisfaction. Why It Matters A metric can improve while the experience gets worse. More sessions may mean more value, or it may mean users need repeated attempts. More notifications may create activation, or it may train users to ignore the product. HEART makes those tradeoffs explicit. Practical Use Name the HEART category your North Star represents, then choose one…
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