The smartwatch's Blood Oxygen app lets you measure the oxygen level of your blood on-demand. It's been MIA for more than a year thanks to a patent spat, but it's back in action now. Apple has your ...

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Does your touchpad have trouble scrolling, clicking, or zooming? Are gesture controls not working properly? Here’s what to do if your laptop’s touchpad has been jumpy or inaccurate. It doesn't matter ...