BEHIND THE PRODUCT: DUOLINGO STREAKS

Summary from the TLDR Marketing newsletter

Duolingo's streak feature, refined through 600+ experiments, drove growth to 600M users and a $14B valuation. Simplifying streak mechanics to one lesson per day and adding streak duration options improved retention by making the experience intuitive and user-focused. The team's iterative approach, tied to DAU and retention metrics, shows the value of aligning product efforts with growth goals.