Exploring your city is a great way to make friends, discover new places, find new interests, and invent yourself. Spotz is an Android app where everyone collectively tags the places they visit and the places in turn tag them back. This means going to a place tagged "fun" increases your "fun" quotient. If people tag a spot "geeky" then going there pushes up your "geeky" score. This tag + location data is used to generate a tag-based persona for you that is constantly evolves based on where you go. You can also follow tags you like to find new "fun" places or find people with similar tag clouds as your own and experience new places together. In addition, you can create tags for individual items at places that others can track, for example, to find who has the #bestchocolatecake in town!