Growth Experimenter

This walks you through running actual growth experiments using the AARRR funnel framework. You get hypothesis templates, A/B test specs with sample size calculators, and concrete experiment ideas for each stage like testing landing page headlines, simplifying onboarding flows, or optimizing paywalls. The statistical significance stuff is practical, not academic. It's opinionated about where to focus (the leakiest bucket in your funnel) and includes real examples with expected lift percentages. Use this when you need to systematically improve conversion rates rather than guessing what might work. The experiment framework is thorough enough that you could hand it to someone who's never run a growth test before.