Circular SLIM progress, but is it enough? Comprehensive review by FITNESATOR Medium Amazon.com: CoolFire Vibrating Alarm Clock Wristband, Silent Wake Up Watch for Heavy Sleepers, Won't Disturb Partner, Vibration Alarm Band for Couples Roommates, Deaf Hearing Impaired, 4 Alarms, Bluetooth App, Rechargeable (Black) : Home & Kitchen The Oura Ring 4 Can Tell You How You Slept or Predict a Cold. Is It Worth It? Reviews by Wirecutter Amazon.com: Smart Ring Health Tracker 5ATM Waterproof Sport Ring Exclusive Vibration Alerts Titanium Blood Oxygen Sleep Emotional Management Women Cycle Prediction Compatible with iOS Android Arctic Silver 6.5 : Electronics Hi everyone. I'd like to buy an Oura Ring 4, but I have one question: does the ring vibrate? And can the vibration be used as an alarm? Thanks.