Automaker apps that implement a custom data interface can integrate with a vehicle to retrieve and respond to data such as climate, radio information, speed, and GPS location. An app might offer a dashboard screen, for example, that presents climate and speed information in a highly visual manner.
Respond gracefully when data is unavailable. Data can become unavailable in the car for a variety of reasons, such as losing the GPS connection while driving through a tunnel. Make sure your app handles connection problems nonintrusively.