Introducing the Cronovo Heart Rate Smartwatch. With every feature you could ever need, this watch will never leave your wrist. Compatible with both iOS and Android devices, the Cronovo is your all-in-one tracker. Featuring Wi-Fi and Bluetooth, the Cronovo relies on its gyro and accelerometer to keep track of your activity. It also features an optical heart rate function and an electrical one. It even records your heart rate variability. In addition to your activity, Cronovo can detect fatigue and your endurance. Finally, as a coach, it helps with your breathing index and metabolic rate. Complete with an interchangeable strap, the Cronovo Smartwatch has a 3-day battery life as well as 4GB of on-board storage. It uses an AMOLED display and runs on Android to also deliver smartphone notifications.