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 yes it's not super comfortable to wear throughout the day, though tbh i never wear a watch as i find them uncomfortable too 😀 

that said, it looks like there's an open source utility to download the raw data from Polar watches through USB https://github.com/cmaion/polar 
i guess that should be safe to use privacy-wise 
 Ah cool, nice find man! I've been deep in the Polar Flow ecosystem for years so I have no illusions about my privacy there 😂 But still cool to play with, I'll see if I can get it to work later, thanks for sharing 🤩 @Gigi this looks like a pretty privacy-preserving option if you wanna go the Polar route 🥸