@best real,

With a data connection the items are online and not on the phone. (or WIFI)


From TomTom:

"STAY CONNECTED
SDL connection: Connect your phone and car to view and control the app from your display.
TomTom Traffic: Get intelligent routes that avoid traffic in real-time.* Data connection
Speed Cameras: Advanced warnings notify you about upcoming speed cameras.* Data connection
Online Search: Look up any destination on the go with our up-to-date database.* Data connection
Share ETA: Let others know your arrival time and location using any messaging channel of your choice."