smartwatch

A smartwatch is a wearable computer in the form of a wristwatch. It integrates a display and computing capabilities to supplement or replace traditional watch functions, and it typically connects to a smartphone or cellular network to extend its features. Common uses include timekeeping, notifications, fitness tracking, and quick access to apps.

Most smartwatches pair with smartphones via Bluetooth and may offer Wi‑Fi and, in some models, standalone cellular connectivity. They provide health and activity metrics such as heart rate, steps, calories, sleep, and increasingly advanced sensors like ECG and SpO2. They enable messaging, calls, music control, and voice assistants, and support third‑party apps for navigation, payments, and productivity.

Hardware and interface vary, but displays are typically touchscreen and may be square/rectangular or circular in shape; some models use rotating crowns or side buttons for navigation. Common sensors include accelerometers, gyroscopes, heart‑rate sensors, GPS, and NFC for payments. Battery life varies, usually from about one to several days depending on features and usage.

Software ecosystems include Apple Watch with watchOS, Google’s Wear OS, Samsung’s Tizen, Fitbit OS, and Garmin OS. Each platform offers apps, watch faces, and health services; some allow app development with dedicated SDKs. Privacy and data security are considerations due to continuous monitoring and cloud synchronization.

Common uses include glanceable notifications, fitness and health tracking, mobile payments, and remote control of connected devices. Limitations can include limited battery life, small screen size, and reliance on a smartphone for full functionality in many use cases.