Most of us have sent a quick "Made it home" text. Apple's Check In and Android's Safety Check can do that automatically—and alert a trusted contact if you don't arrive safely. Learn how these built-in features work, why they're useful, and how to set them up in just a few minutes.

There's a small box somewhere in your home or office that connects everything to the internet — and its default settings are probably working against you. A free, ten-minute adjustment can improve your privacy, block malicious websites, and even filter adult content. Here's how.