I released my new app 'LandQuest' a few days ago for Android:
The aim is to allow people to create and share circuits for others to play. On each waypoint of a circuit, the player will be asked to take the same picture as the circuit creator: the closest to the original the picture is, the more point you earn. Each picture comes with an associated comment: either a description or a riddle, and the player can be prompted for an answer.
All in all the idea is to provide an entertaining way of 'going for a walk', along the lines of geocaching or, in a way, pokemon go.
Please try it and tell me what you think, although there is not much content as of today, just a few circuits in my area. I'd really appreciate if some of you could actually create a few paths in their area too!
Many thanks to Gideros community!