Wearable Devices
Roughly 1.2 billion wearable devices were in use worldwide by end of 2024 — smartwatches (Apple Watch, Garmin, Samsung Galaxy), fitness trackers (Fitbit, Whoop, Oura), increasingly smart glasses (Meta Ray-Ban, Apple Vision Pro, Snap Spectacles). Health data integration and AI capability are the major growth vectors. The category has overtaken tablets in unit sales.
Key insights
Smartwatches dominate the wearable category
Apple Watch leads premium smartwatch sales globally (~30% share). Samsung Galaxy Watch, Garmin, Huawei follow. Affordable bands (Xiaomi, Amazfit) lead unit volume. Smartwatch attach rate to smartphones: ~25% in advanced economies. The Apple Watch's health-sensor expansion (ECG, blood oxygen, sleep tracking, irregular rhythm notification) has driven its dominance among health-focused consumers.
Fitness trackers diversified into specialty segments
Fitbit acquired by Google (2021) is being integrated into Wear OS. Whoop and Oura built loyal subscriber bases with health-coaching subscription models — Oura ring has ~2.5M+ users with premium positioning. Garmin maintains strong position in athletics/outdoor. Apple Watch continues as the integrated default for most general users. The category has stratified by use case rather than consolidating.
Smart glasses are the emerging frontier
Meta's Ray-Ban Stories partnership has sold ~2M+ units 2023-24, integrating AI assistant (Meta AI), camera, microphone, audio. Apple Vision Pro (2024 launch): premium but slow adoption. Snap Spectacles, OPPO, Xreal compete. The category is small but growing fast. AI integration is the key feature — smart glasses become a personal AI interface, with voice-first interaction and visual context. Long-run potential is large; short-run market is small.
Annual wearable device shipments 2014–2024
Million units per year worldwide
Key Finding: Steady growth from <30M (2014) to ~220M+ (2024). Apple Watch alone ~40M/year.
Top wearable brands by 2024 shipments
Million units, all wearable types
Key Finding: Apple is the highest-value brand; Xiaomi the highest-volume.
Methodology & caveats
Wearable categories
IDC classifies: smartwatches (full-featured, app-capable), basic watches (simple display + fitness), wristbands (lower-end), earwear (AirPods, etc.), smart glasses, smart clothing. Different reports include different categories. AirPods alone are ~120M/year — often excluded from 'wearables' headlines but technically wearable.
Health data implications
Wearable-collected health data (heart rate, sleep, activity, ECG, blood oxygen, glucose for some emerging devices) is increasingly used in research and clinical care. Apple Heart Study (400k+ participants) demonstrated wrist-based AFib detection. Whoop and Oura provide research APIs. Privacy and regulatory frameworks (HIPAA in US, GDPR in EU, FDA medical device path) shape how data flows.
Smart glasses challenges
Smart glasses face: battery life (heavy compute drains batteries), social acceptability (privacy concerns about cameras), optical quality, weight, cost. Meta Ray-Ban succeeded with non-display approach (audio + camera + AI). True AR glasses (Microsoft HoloLens, Magic Leap) have struggled commercially. Apple Vision Pro is too heavy for daily use. The technology-readiness vs market-readiness gap is wide; the next 5-10 years should resolve.