Can I make the speed bigger on CarPlay?
Choose a value-first or single-column layout for the Live tab and show fewer stats. For the largest digits of all, use a Phone Mount design on your iPhone.
CarPlay apps are built from Apple's templates, so the car decides the exact text size. You can still make your speed stand out: in Odo's CarPlay settings, choose a value-first or single-column layout for the Live tab, put speed first, and show fewer stats so each one has more room. On iOS 26 or later, the Display setting for your car (iPhone Settings → General → CarPlay → your car → Display) can enlarge everything on the CarPlay screen. For the biggest possible digits, mount your iPhone and use one of the Phone Mount gauge designs such as Big Digits, which fills the screen with your speed.
