Apple's recent update to its iOS 18 operating system has sparked significant concern among developers of social and messaging applications. While the update introduced various artificial intelligence features, a less publicized change regarding contact-sharing permissions has raised alarms about the future viability of new social apps. This change, referred to as "contact sync," has historically been crucial for the growth of platforms like Instagram, WhatsApp, and Snapchat, enabling them to connect users with their existing contacts and facilitate rapid user acquisition. The modification in iOS 18 allows users to selectively share their contacts with apps, rather than granting blanket access to their entire address book. This shift has led some developers, such as Nikita Bier, to express dire predictions about the impact on new social applications, suggesting that they may struggle to gain traction in a landscape where established players like Facebook and Instagram already benefit from extensive user networks. While there is sympathy for the challenges faced by new app developers, there is also recognition of Apple's rationale for enhancing user privacy. The company argues that users should have more control over their personal information, allowing them to choose which contacts to share rather than being forced into an all-or-nothing decision. Apple believes that this could potentially lead to increased contact sharing, as users who previously opted out might be more willing to share selected contacts. However, many developers contest this view, citing data indicating a significant decline in contact sharing since the implementation of the new permissions. The ability to connect with friends quickly is critical for the success of social apps, and even a modest decrease in contact sharing can hinder user engagement and retention. Developers have also pointed out that Apple's own services, such as iMessage, do not face the same restrictions, raising concerns about competitive fairness and self-preferencing. The implications of these changes could lead to a shift in the social app landscape, with a potential decline in friend-based applications in favor of content-driven platforms like TikTok or AI companionship apps that do not rely on human connections. This evolution highlights the powerful influence that major tech companies like Apple wield over the industry and the delicate balance between promoting competition and ensuring user privacy.