There are currently two ways that DuckDuckGo can help protect an iOS user’s privacy. The first, and best, is the user downloading the DuckDuckGo Privacy Browser and using that for all of their browsing. The other way is that the user continues to user Safari (or a different third party browser) and adopts DDG as their search engine. This prevents their searches from being tracked, but once they are off to browsing they are certain to be tracked again.
I propose adding a Content Blocker Extension to the DuckDuckGo Privacy Browser App. It’s a tough sell getting users to install a whole new browser, importing their shortcuts, learning a brand new UI, etc. It’s tough enough to get them to install an app in the first place!