Triposo by Mobindustry Corp.

Some details

One travel guide for the whole world. It',s free and works offline.
We cover every country and thousands of cities. 
• Offline maps, offline routing, and offline city walks.
• A complete guide to all the attractions and sights. You won’t miss a thing!
• All the information you need to decide what hotel to book, what room to get and a smooth way to make your reservation.
• Book attractions tickets,

… experiences, and guided tours right from the app with the same easy checkout process.
• The best bars, clubs, shops, restaurants and the tools to find exactly the places you are looking for.
• Smart suggestions to surprise you with hidden gems to discover.
• With one simple in-app purchase you get expert advice from Fodor',s travel writers.