Apple's App Store Review process, while sometimes feeling personal, is highly standardized. A significant portion of app submissions are rejected, but many are fixed and resubmitted successfully. The most frequent reasons for rejection, according to Apple, are performance issues and bugs, followed by legal, design, business model, and safety concerns. Understanding specific, recurring guidelines can transform a vague rejection into a clear checklist for improvement.Guideline 2.1, App Completeness, addresses issues like crashes and placeholder content that prevent reviewers from testing the app. Guideline 4.2, Minimum Functionality, flags apps that are merely repackaged websites or built from generic templates without added value. Spam and duplicate submissions are covered under Guideline 4.3, which includes reskinning apps for different regions or creating near-clones in saturated markets.Guideline 5.1.1, Data Collection and Storage, mandates clear privacy policies, explicit user consent for data collection, and account deletion options. Guideline 3.1.1, In-App Purchase, requires that all digital content unlocks be handled through Apple's system, prohibiting workarounds like license keys or external payments. Recent changes include the enforcement of privacy manifests for third-party SDKs beginning May 2024 and an update to Guideline 1.2 clarifying rules around random chat features as of February 2026.To avoid rejections, developers should carefully read specific rejection messages, provide working demo accounts, and adhere strictly to Apple's in-app purchase policies. Checking for privacy manifests before integrating new SDKs is also crucial. Ultimately, most rejections stem from apps not doing what they claim, mishandling user data, or violating payment protocols.