This is a pretty niche thing to do. I wear an Apple Watch for the convenience, but I’m also very concerned with how terrible Bluetooth is from a security perspective. Leaving Bluetooth on all the time on your phone is a terrible idea. (This is well documented). I went off in search of information on if it’s possible to use an Apple Watch without iPhone’s Bluetooth turned on (TL;DR Yes!) and whether it’s worth by time to do so (TL;DR more complicated by still Yes!
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