Casio need to market their watches better, they have the Smartestdumbwatch**** of them all -
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.
Ive got two BT enabled G Shocks, one of them my daily driver for the past year and I can't fault it. It's just a normal watch, with normal watch battery life and normal G Shock robustness - except that it savese having to pull my phone out of my pocket everytime I get a notification.
Going to be completely honest, havnt delved into the fitness tracking much - the watch appears to have a step counter but unsure if this is app dependant or not.