ThoughtFi is an application where users can post their Marks on a location. A mark is a user’s thought including location, text message and a photo. Users can post comments to another user’s Marks. The users can log-in by using OAuth 2.0 (Facebook, Google+, Twitter) or they can sign-up and log-in using their email address. They can share their Marks, search other’s Marks around their locations and view a Map showing all the Marks globally.