Look into Amazfit watches. They're about as close as you can get to a Pebble these days. It also has a bunch of fitness stuff (GPS, steps, heart rate), but you can mostly just ignore that. Mine is just for notifications, stopwatch, and telling the time, and a charge still lasts more than 2 weeks on the original 6 year old battery (I've worn it roughly 23/7 since April 2018).
The newer Amazfit Bips sadly don't have transflective displays and do not last a month like the original Bip line used to. Why they killed off the unique feature of this product line and made it another generic LCD smartwatch when Amazfit already has several product lines of those I have no clue.
