WatermelonDB is an offline-first data synchronization engine and reactive database library designed for mobile and web applications. It provides a persistent storage layer backed by SQLite, enabling applications to maintain full functionality and data consistency while operating without an internet connection.
The framework distinguishes itself through a reactive data binding system that automatically updates user interface components whenever underlying database records change. It utilizes schema-driven model mapping to generate type-safe interfaces and employs lazy object materialization to load records into memory only when accessed, which helps maintain performance when managing large datasets.
To support distributed data consistency, the system implements delta-based synchronization to transmit only specific record changes to remote servers. It further ensures application responsiveness by offloading query execution to background threads, preventing blocking of the main interface during intensive data operations.
