In 2013, Apple Inc. introduced iBeacon technology, which operates on the Bluetooth Low Energy protocol, enabling devices to broadcast information for location-based applications. This innovation allows multiple devices to interact without direct pairing, which is typically required in standard Bluetooth connections. Primarily focusing on iOS, the blog describes how the EPage team, led by Ed Arenberg, integrates this technology with Couchbase Mobile to develop applications that log and synchronize data across devices using iBeacons. The service utilizes Couchbase Lite for local storage and Couchbase Sync Gateway for syncing data when network connectivity is available, ensuring data consistency across various app instances. The implementation involves object-relational mapping for handling beacon data in native classes and setting up replication processes to manage data synchronization seamlessly. The approach highlights how developers can build sophisticated services that maintain state consistency across a network, paving the way for more advanced location-aware applications.