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The Caeden Sona stress-fighting tracker caused me anxiety instead
It sounds like a great, if somewhat abstract, idea. The Caeden Sona is a gorgeous wristband with a heart rate monitor that constantly measures your pulse, in an attempt to gauge how you respond to stress. It then teaches you to build resilience to stress through daily focus and breathing exercises. I tried out the Sona for about a week and was ultimately so overwhelmed by its design flaws that I was, ironically, overcome by stress.