Good mobile apps are indispensable traveler tools. Install before departure to avoid issues without network. Maps and navigation Google Maps — download offline map before arrival. Maps.me — fully offline, good for hiking. Waze — best for city car. Transport Omio/Trainline — train and bus tickets. Uber/Bolt/Free Now — city taxis. Rome2Rio — route comparison. Language and translation Google Translate offline (download language pack). DeepL — better quality for German, French. Duolingo — basics learning before departure. Accommodation ForAll — verified catalog. Booking.com — international. Hostelworld — hostels. Advice Always download offline before losing network. The ForAll portal has an app list recommended by locals.