Gadgetbridge is an Android application for your smart watch and other devices
Gadget bridge is amazing. I use it all the time with my Amazfit watch. Very privacy friendly, the app doesn't even ask for internet permission. It syncs better than the other third-party is app "Notify for Amazfit". That one always stopped syncing activities after a while.Unfortunately it has some problems too. The weather function requires a third party app (because of the lack of internet permission) that fails to update automatically. And many features are not supported or don't work well.But it serves me well overall with some workarounds with my Amazfit GTS 2 mini. I have a pinetime too but that still needs a lot of love to be usable.