A diagnostic SaaS tool that connects to App Store Connect via API, audits in-app purchase and subscription configurations against Apple's current review requirements, and surfaces specific mismatches or missing steps. It would provide a step-by-step remediation checklist, detect common pitfalls (e.g., products not linked to the app build, missing screenshots, pricing tier gaps), and generate a templated Apple Review response when rejections cite policy conflicts like the IAP linking rules.

Apple's StoreKit 2 migration, the 2024 DMA-driven changes to external payment link policies, and the explosive growth of solo developers using RevenueCat and Superwall have created a surge in confused first-time submitters hitting undocumented edge cases. The policy landscape is actively shifting, making up-to-date automated validation increasingly valuable.