Yes! You'll have offline access to your personalized guidebook in the ViaHero app, plus offline access to your custom maps via the Google Maps app.
Guidebook: After loading your guidebook, toggle the "Make Available Offline" button in the app. This will save everything in your guidebook to the ViaHero app.
Customized Map: Download your offline Google map and load your Hero's customized map overlay (link located in the maps section of your guidebook) before you depart on your trip. With everything saved on your mobile device prior to departure, you'll be able to navigate to all of your Hero’s recommendations, which are highlighted on the map, plus any place that exists in Google Maps—all offline!
While traveling, remember to turn OFF your data so you don't get roaming charges, but make sure the GPS on your mobile device is turned ON to be able to see your blue location dot within your Google Maps app. Since your guidebook and maps are all pre-loaded, you won't need any wifi or cell data connection to navigate.
Remember: Download the offline Google map and load your Hero's customized map overlay before you depart on your trip to ensure that all locations are saved in the Google Maps app. See below for download instructions.