The four-year-old TripAdvisor City Guides app had amassed travel guides and downloadable maps for some 300 cities around the world and these are all available now in TripAdvisor’s main app. They can be used offline for travelers shuffling around various destinations and concerned about data charges. Unlike most guide books, the TripAdvisor app is thus not only informational but also actionable: You can book the hotel and make restaurant reservations, as well as summon an Uber ride to get you to the activity or destination. Other booking apps haven’t kept pace with TripAdvisor’s breadth of content. The Expedia app, for example, offers hotels, flights, cars and activities but the guide-oriented information is relatively sparse and devoid of user reviews. Get the full story at Skift