Standard option in a popular rideshare app

UBERX

Think of the most affordable ride type when you open that black-and-white app.

This clue refers to the basic, most affordable ride option in the Uber app, which is called "UberX." The "X" here isn’t a letter with hidden meaning—it’s just part of the brand name for Uber’s standard service, distinguishing it from premium options like Uber Black or UberXL. If you’ve ever used Uber, this is likely the default choice that pops up when you request a ride. The clue plays on the idea of a "standard" being the go-to or most common selection.