We have a startup called TripScout, it is an app that will allow people to do self-guided tours in various destinations around the world. People sign up, download the guides, and can see a map full of highlighted locations in the city that they are in. They can click on a highlighted location and read a short blurb about the place and listen to audio to complement it. Also, the maps are available when offline as to save cellular data and battery life on a mobile phone.
Hello!
I live in Finland,Helsinki. Its a great place for tourists from all over the world. I have also made a bus tours around my city, so I can tell a lot of interesting. Will be waiting for your respond!
Best regards!