iPhone apps that appear on the car’s built-in display are optimized for the driving environment and meet the unique demands of the car. The best apps support brief interactions and never command the driver’s attention. On-screen information is minimal, relevant, and requires little decision making. Voice interaction using Siri enables drivers to control many apps without taking their hands off the steering wheel or eyes off the road. Well-known iOS paradigms, including interface elements, icons, text appearance, and terminology provide a familiar, intuitive experience.
iPhone apps like Maps, Messages, Music, and Phone display car-appropriate interfaces that look great in CarPlay and are easy to operate while driving. The audio app, automaker app, messaging app, or Voice over Internet Protocol (VoIP) app you design should be just as simple and easy to operate.