auカーナビ is an offline and online car navigation app that offers comprehensive features for iOS users. The app generates road maps in real-time using an automatic system, allowing users to access the latest maps and traffic information. The app's offline feature provides users with the ability to browse maps, conduct route searches, and use voice navigation even when they are outside the communication range.

The app's online feature provides users with the latest maps, real-time traffic information, and the ability to choose from a variety of recommended routes. The app offers eight different route options, including recommended, high-speed, and free routes, and also considers factors such as fuel consumption, scenic views, and distance. The app even offers personalized route options based on the user's driving history.

The app is compatible with CarPlay, allowing users to connect their device to a CarPlay-supported display for safer and more comfortable usage while driving. The app can be downloaded for free, but users must purchase a monthly subscription for full access to all features. The monthly subscription cost is $600 (tax included), and users can purchase it through the app's in-app purchase feature.