HX-1 - Can I run both Drive and Explore mode apps at the same time

Yes, you can!

If you start either Drive mode, or Explore mode, and then use the back button to exit back to the HX-1 Main Menu, the app is closed.

However, if you tap-and-hold the Back button, then tap the Home button, and return to the Main Menu via that method, the app which was running will be left in the background, and you can start the other app.

Why would you want to do this?

Well, you might want to use the features in Drive mode for Navigation, but leave a track log running in the Explore mode in the background.