Tech specs are crucial for successful iOS feature development as they provide a blueprint and align various teams involved.The structure of a tech spec includes sections like Project Details, Problem, Hypothesis, Test Plan, and more.Cross-Functional Inputs and Eng Explorations are also important parts of a tech spec document.The scope, design/content specs, risks, A/B test setup, code pointers, and timeline are key elements covered in a tech spec.Tech specs help in understanding risks, setting success criteria, and prioritizing work efficiently.They also help in quantifying opportunities and avoiding unintentional scope creep during project development.An example includes improving push notification opt-in rates to increase app retention by showing an educational screen before prompting.Specifying the project's boundaries, risks, and code implementation details are essential for a comprehensive tech spec.Setting up timelines, conducting weekly meetings, and aligning non-code dependencies are vital for successful project execution.Overall, writing detailed tech specs demonstrates technical leadership and enhances project success by aligning goals and people.