A. 1. Update the app: Ensure you are using the latest version of WienMobil, as updates often fix bugs and improve navigation. 2. Restart the app: Close WienMobil completely and reopen it to refresh the app and potentially resolve bugs.

B. 3. Clear app cache: Go to 'Settings' > 'General' > 'iPhone Storage', find WienMobil, and select 'Offload App' to clear cache without deleting data.