Casio have several lines that support Bluetooth - essentially will beep and vibrate on Notifications, calls and messages. Does basic fitness tracking. It also does all of this whilst basically being indestructible and a battery life of atleast 3 years.
No one seems to know this and I blame Casios poor marketing - I didn’t know any of this until I bought a new G-Shock and realised it had a BT label in the manual.