Tired of logging into dozens of online accounts to do Internet banking and pay bills? New apps are designed to ease the burden by gathering and organizing documents for you. About 61 percent of Internet users in the United States do their banking online and the number is growing, according to the Pew Research Center. “We’re like a personal assistant that manages all the paperwork for you,” said Martin Stein, chief marketing officer for FileThis, based in Marin, California.