<ul data-eligibleForWebStory="false">A money app launched an 'AI Spending Coach' with much hype but saw poor user engagement within weeks.The article discusses common myths about AI implementation and emphasizes the importance of solving real problems.Guidelines for building AI features include starting pragmatic, focusing on user value, and ensuring sustainable costs at scale.The key is to design AI features that provide immediate value, prioritize user experience, and focus on outcomes rather than technology hype.