PTCruiser iPhone application for Pivotal Tracker. Open source iPhone application for accessing Pivotal Tracker on the go. User interface is just what you need to access the agile project management tool. You can create new stories, assign them to collaborators, comment on existing stories, and accept others’ work. Only downside is no offline syncing, but it doesn’t really make sense in this context because most of the time you want to perform write actions anyway.