WebSocket

WebSocket is a communication protocol that maintains a persistent connection between mobile apps and servers, enabling instant, bidirectional data exchange. Unlike traditional HTTP requests where apps must repeatedly ask servers for updates, WebSocket keeps a connection open so servers can push data to apps immediately when events occur. This makes WebSocket ideal for real-time features like chat messaging, live sports scores, stock price updates, or collaborative editing where users need to see changes instantly.

When an app establishes a WebSocket connection, both the app and server can send messages at any time without the overhead of creating new connections for each message. This continuous connection uses less battery and bandwidth than repeatedly polling servers for updates. WebSocket is particularly valuable for applications requiring low-latency communication, such as multiplayer games, video calls, or live auction bidding where milliseconds matter.

For businesses building mobile apps with real-time requirements, WebSocket provides superior user experience compared to alternatives like polling. Users see updates instantly rather than waiting for the next polling cycle, creating responsive, engaging applications. However, WebSocket connections require different server architecture than traditional HTTP APIs and consume more server resources since connections remain open. Most modern app development companies implement WebSocket for features genuinely requiring real-time updates while using REST or GraphQL for standard data operations where instant delivery isn’t critical.