TuneIn, a free streaming audio aggregation app that lets listeners hear music, sports and news from around the world, has launched TuneIn Donate, which enables listeners to contribute to pubradio stations. KQED in San Francisco is piloting the new app, available for iPhone, iPod Touch, iPad and Android smartphones. TuneIn said in a statement that since using TuneIn Donate, KQED “has seen a meaningful increase in traffic” to its website donation page, although it provided no details. “KQED donors are some of the earliest adopters of new technologies,” said Tim Olson, station v.p. of digital media and education. “We are excited to be part of this groundbreaking initiative and are encouraged with the initial results.” TuneIn plans to offer TuneIn Donate to listener-supported stations worldwide by the end of the year, it said, adding that 100 percent of donations go to stations.