I’m in a London branch of the Apple Store, about to buy a pair of Apple watches. And not for any of the standout apps or ludicrously expensive straps, but because it has a “send your heartbeat” feature. “Place two fingers on the screen until you see and feel your heartbeat. Lift to send,” says the website. It’s because when my husband Dion is in the pub, his boss and workmates are quite snooty about him texting me every hour or so to let me know he hasn’t died — but with this watch, he could just discreetly send a heartbeat. This…
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