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I defy you to find a better TourGuide App. This has everything you need and is totally free with no annoying ads.
I really like it.
Some more super enhancements.
Travel guide with audio sightseeing tours for 900 cities around the world!
Official guide for Hamburg - 1,500 POIs, tours, audioguides, shipfinder and more
Worldwide Travel Guide App - with audio tours & offline maps !