I looked at Trover (free) a couple of years ago and found it a useful app for seeing what is around you with photos and comments from real travelers rather than what is contained in a guidebook. It has elements of Yelp, Instagram and other social content aggregators.
When you post your own photo, the app makes it public (so be careful) with all the geo-location data available so you can find a particular location. You can add comments about a photo -- perhaps a nice park, a restaurant, a local festival, whatever you like. You can contact the people who take the photos, and they can contact you. As a result, Trover is kind of a living, evolving guidebook to places filled with images and comments from people who experience them.
You don't have to create a Trover account if you just want to be on the receiving end of the information, but for some people, a big part of the fun is sharing insights.