Why Supabase Row Level Security is essential for AI-built mobile apps

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AI-generated mobile apps using Supabase often ship with Row Level Security (RLS) disabled, leaving database tables exposed to anyone who extracts the anon key from the app bundle. Unlike web apps, mobile apps cannot hide sensitive keys server-side, making database-level access controls critical from the start. RLS works inside Postgres by applying a hidden WHERE clause to every query, ensuring users can only access their own rows regardless of how the database is called. A secure setup requires both correct grants — which define what operations a role can perform — and policies, which restrict which rows are affected; missing either can result in silent data leaks. Developers are advised to enable RLS on every exposed table, apply minimal grants, and use owner-based policies tied to the authenticated user's ID with no exceptions, even for prototypes.

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