6. Detour
For those who think that private tours belong solely in the realm of the rich, Detour exists to prove them wrong and provide all of its wonderful services. They offer immersive audio walks and with the use of your GPS signal, it will guide you through the most interesting and fun places, with the people that know them best telling you all about it via your headphones. For anyone who wants to know more about their destination, this would be an entire guide book, irrespective of whether you are between flights, on a business trip, or on a holiday, it will make itself helpful.