It is “independent from search” in the sense that people who just use DDG as a web search provider from any browser other than DDG’s own will be unaffected by t

It is “independent from search” in the sense that people who just use DDG as a web search provider from any browser other than DDG’s own will be unaffected by this constraint, and will browse just as anonymously as if this constraint was not imposed. (Which is to say: as anonymously as their browser enables for them, with DDG not being the limiting constraint. Not so anonymous for Chrome; much more anonymous for Brave / TorBrowser / etc.) All this constraint is doing is limiting the increase in privacy you get from using the DDG mobile app on top of the privacy you get from using the DDG web search provider. At worst, DDG searches in the DDG app will be no less private than DDG searches done in any non-privacy-enforcing browser, e.g. Chrome. Which is to say—still pretty private. Also, I presume that only a minority of DDG users are users of the DDG mobile browser app. (I didn’t even know it existed!)