PJ Celis, founder of JudgeMe, breaks down the five core beliefs that took his review app from zero to 500,000 installs—without a sales team or outside funding. From pricing theory and customer support to platform strategy and team design, PJ unpacks the operating system behind Shopify’s most-installed app. It’s bold, honest, and full of battle-tested advice for founders looking to play long on the Shopify App Store.