I have a pinetime and I basically just stopped using it. I thought it being open source would mean I could add my own features, but development for it sucks and it's massively limited.
It has 512kb of flash, and Over 400kb is already taken by the base firmware. Also, you have to flash a new firmware every time you want to try a new feature.
64kb of ram, too. So you have to be extremely cautious and careful about how you code any features.