Freeware (the underlying WebView components provided by the operating systems) though DuckDuckGo's custom code for Android and iOS is shared with an Apache-2.0 license[2][3]
In May 2022, an independent researcher discovered that tracking scripts by Microsoft products like Bing and LinkedIn are not blocked by the browser.[16] DuckDuckGo's founder and CEO explained it by noting that the company was "currently contractually restricted by Microsoft" due to their use of Bing as a provider of results in DuckDuckGo search. This meant the browser could not block Microsoft scripts.[17] In August 2022, however, the company announced that they would block Microsoft trackers in its browsers.[18]