If you want to live the WHAIWHAI experience from the comfort of your own home, type “sofa” in your first WhatsApp message. The game dynamic is the same, except that it will be possible to solve the enigmas without actually going to the locations. The questions you’ll need to answer will be about historical events, people and works of art in the places where the stories are set. All you need is your cultural knowledge.
You can either play alone and enjoy an atypical tour of the city, or in a group. Either way, all you need is one guide and a smartphone. You can also customize your experience, choosing how long to play, which part of the city you want to start in, and whether to play at the easy or the advanced level.
For all the following situations there's a WHAIWHAI solution that fits your needs.
You can enjoy your WHAIWHAI experience with iPhone: a dedicated application starts and manages the visit in your favorite city. 
The Ruyi activity is an amazing trip through one of the most mysterious cities in the world. I was taken to corners of Venice and shown sights that I never would have encountered on my own self-guided walks through the city.
Logan
Want a way to explore Rome that's part Harry Potter, part Da Vinci Code? The interactive game will have you wandering through the streets on a quest for answers to cryptic clues.
National Geographic
...the Ruyi always evades discovery. But the real treasure is in experiencing a fun new twist on sightseeing in the Eternal City.
TIME