Apple’s Mac computers have long offered users a built-in speech engine that can read on-screen text aloud—but did you know that your iOS device can do the same thing? To activate the feature, open the Settings app, tap on Accessibility, tap on Speak Selection, and turn on Speak Selection. Once you’ve got that set up, simply select any text, and you’ll see a new “Speak” option sitting next to the standard copy option.…