On Liberating My Smartwatch from Cloud Services

Article note: Bunnie's note that "The point of open source is not to ritualistically compile our stuff from source. It’s the awareness that technology is not magic: that there is a trail of breadcrumbs any of us could follow to liberate our digital lives in case of a potential hostage situation. Should we so desire, open source empowers us to create and run our own essential tools and services." is a lovely expression. This reminded me to check, it looks like Gadgetbridge + an Amazfit Bip might actually have the feature (heartrate, sleep tracking, etc.) and non-feature (no cloud, records with no bluetooth connection and syncs later) set I've been looking for in a smartwatch.