Few startups make it through a year without a pivot or two these days. That really can’t be said about social bookmarking service Pearltrees, however. The company has stuck pretty closely to its roadmap ever since its launch in 2009. After launching on the web, Peartrees is now available on the iPad and, starting today, on the iPhone. Ever since its launch, the company wanted to provide its users with a library of what they discover online and create a community of people based on their common interests. Until now, that mostly means sharing bookmarks, but the new iPhone app significantly broadens this concept to also include photos and short notes. In addition, the updated universal iOS apps now also cache a user’s libraries for offline access (including the text on any website they bookmark).