Citizen 41mm Fitness Smartwatch

This smartwatch features a wellness app using NASA and IBM AI research for personalized alertness forecasts. It is compatible with iPhone and Android, offering Bluetooth, Wi-Fi, GPS, and NFC connectivity. It includes sensors for heart rate, SP02, and activity tracking, and charges fully in 40 minutes. Price drops from $169.99 to just $129.99. Shipping is free with Amazon Prime or is otherwise a flat $6 per order.