Example Concept: Offline data synchronization typically uses a local database (e.g., SQLite, Room, Core Data) to store data changes made while offline. When the device regains connectivity, a sync manager coordinates with a remote server to upload local changes and download updates. Conflict resolution strategies, such as last-write-wins or custom merge logic, ensure data consistency. Frameworks like Firebase or AWS AppSync can simplify this process by providing built-in synchronization capabilities.