Back in March, Netflix revealed that it was working on a "data saver" feature for its mobile apps. Keeping its word, the streaming service announced today that the cellular data tool that allows users to adjust video quality to save data is available in its iOS and Android apps. In fact, we're seeing the new feature in both Netflix apps here at Engadget HQ. By default, the software adjusts video quality to allow for about 3 hours of streaming per gigabyte of data. The company says that tests showed this to be the best balance of data use and quality when streaming over a cellular connection.