There are tonnes of city guide applications available for you smartphone users out there, but this one takes the cake for its luxurious lifestyle slant. One of the world’s greatest concierge services, Quintessentially has offices in 51 countries, making their research and recommendations in their guide for global cities some of the most accurate and helpful suggestions around. You get more privileges from the guide if you are a Q member, read up more about Quintessentially via their website.