Horizontal and vertical information architecture
The information architecture is aligned with the customer journey. The tab navigation of the app reflects exactly the steps from the user journey: from the inspiration part (Grand Tour tab), to the planning (Planning tab), to the functionality which is necessary and relevant when being on the Grand Tour (Discover and Collect tab).
Based on your selection, you can dive deeper into the information architecture. E.g. when using the Around Me functionality (Discover tab), you'll get a detailed view what kind of touristic objects are nearby and you can filter them (like E-Charging stations, accommodations, Photo-Spots, etc.)