Couchbase Mobile is a complete package that includes an embedded database, providing enterprise-class scaling when needed. It offers ease of use and architectural flexibility, making it a compelling choice for mobile app development. Unlike relational databases like SQLite, Couchbase Mobile uses a document-based approach with JSON objects, allowing for flexible schema design and easy data storage. This makes it easier to map natural structures in code to database constructs, reducing the need for manual schema design and SQL statements. The database also provides scalability features, including Sync Gateway, which enables off-device operations and supports large-scale applications. Overall, Couchbase Mobile offers a modern, document-based solution that is easy to use and adapt to changing needs.