I downloaded the app, went to the search engine, and discovered that the font/screen was so small I couldn't read it. I spent about an hour trying to figure out how to make the font/screen larger but to no avail. DuckDuckGo apparently doesn't have any sort of "Contact Us" feature or tech support, so I don't have anyone to ask. For wasting my time, I'd give it a 0 rating if I could.