Smartband as smartwatch for notifications

Anyone is using some smartband / wristband as “tethered smartwatch” for notifications only? I mean reading messages and calls notifies?

I’m quite interested on it, as smartband with some OLED display can run for 4-5 days. But there are plenty of them and I don’t know if battery last so long, screen is sunlight readable, notifications comes with full text, etc…

Wrong I have this thought before.I love sports,bracelet maybe more suitable.