How accurate are sleep trackers? We investigate 1920w, 300w, 1200w, 768w, 1536w, 16w, 32w, 28w, 56w, 64w, 712w, 1000w, 792w, 1280w, 840w, 1340w, 770w, 356w, 675w" type="image/webp"/>A Fitbit Versa 3 rests in a pile of bedding, displaying a user's sleep data.

Kaitlyn Cimino / Android Authority

The booming coffee industry suggests that many people aren’t bursting with natural energy. Most experts agree that one culprit behind our collective exhaustion is poor sleep. In response, the biggest names in tech —including Fitbit, Garmin, Apple, and more — offer tools to help users build better habits….

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