The choice between NoSQL and SQL databases depends on the specific requirements and characteristics of the app’s backend.

SQL databases are better suited for applications that require complex queries, structured data, and strong data consistency. They provide ACID (Atomicity, Consistency, Isolation, Durability) properties, ensuring data integrity. SQL databases are commonly used in applications that deal with financial transactions, e-commerce, or any scenario where data consistency is critical.

On the other hand, NoSQL databases are better suited for applications that handle large amounts of unstructured or semi-structured data, require high scalability, and have flexible schema requirements. NoSQL databases provide high performance and horizontal scalability, making them suitable for applications with high read/write workloads, real-time analytics, or content management systems.

Ultimately, the choice between NoSQL and SQL databases depends on the specific needs of the app’s backend, including data structure, scalability requirements, performance expectations, and the nature of the data being stored and accessed. It is important to carefully evaluate these factors before making a decision.