Drivometer

Drivometer is the best way to easily and accurately track your speed while driving.
The interface is simple and intuitive, designed to minimize distraction while driving. Convenient widgets show you Now Playing info*, your current battery percentage, the current time, and the date. The interface also auto-rotates so you can use Drivometer in portrait or landscape.
Drivometer also offers other features and options, such as a heads-up display mode, interface customizations, and auto-setting your brightness to 100%. You can also switch between Miles and Kilometers.
Finally, there's no ads, In-App Purchases, or premium features. Just $0.99 up front and you're done.
Drivometer uses your device's GPS, but your location or other information is never collected.
*For Apple Music / iTunes only.