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How-to Guides
Our experts test and rate hundreds of products each year. We’re updating our roundups all the time, so you always know what’s best to buy.
Your Apple Watch Can Once Again Measure Blood Oxygen Levels. Here's How
If Blood Oxygen vanished, here’s how to enable it again—supported models, setup, tips.
Is Your Laptop Battery Dying? Here's How to Check in Windows
Generate Windows’ battery report, read wear and cycles, and apply fixes or upgrades.
I Set Up a Burner Phone Number to Protect My Privacy. You Should, Too
Create a secondary number for sign-ups and marketplaces—keep your real number private.