I have been looking for an app like this for a while. There are other pinning apps, and some do things this one doesn't, like import checkins and social media stuff, or display all your contacts, but this is my favorite of the apps, because it is very good at what it does. Being able to
Color-code pins as well as create Collections and group those into Folders is very helpful. I am using this now instead of Foursquare/Swarm to keep track of pretty much everywhere I go for work and personal stuff.