Fabric , a personal journaling app that emerged from Y Combinator’s 2016 batch of startups , is relaunching itself as a Facebook alternative. The app is giving itself a makeover in the wake of Facebook’s closure of the Moves location tracker, by offering its own tool to record your activities, photos, memories and other moments shared with friends and family. But unlike on Facebook, everything in Fabric is private by default and data isn’t shared with marketers. Instead, the startup hopes to build something users will eventually pay for, via premium features or subscriptions. The idea for the startup came from two people who helped create Facebook’s core features. Co-founders Arun Vijayvergiya and Nikolay Valtchanov worked for several years at the social network, where Vijayvergiya built the product that would later become Facebook Timeline at an internal hackathon. He also worked on products like Friendship Pages, Year in Review and On This Day, while Valtcha...