To power modern financial services apps with Apollo GraphOS, developers can leverage the concept of a supergraph to increase development velocity and provide a singular API for frontend and backend teams. A financial services supergraph allows for a one-stop shop for frontend developers to access relevant data and build new features rapidly. By using Apollo GraphOS, backend teams can independently manage portions of a schema while maintaining safety and security. This approach enables the delivery of personalized customer experiences, securing APIs declaratively, adopting a Customer 360 approach to prevent fraud, ensuring compliant and secure third-party access, and more. By exploring a financial services supergraph schema and running real queries, developers can see the possibilities of this architecture firsthand.