Which website are you referring to? I tried old.reddit on my mobile and fonts are so small (apparently it's the desktop website) that posts were barely readable. And if you use the new reddit website (which pretty much sucks IMHO), you could as well use their app, because it's literally the same (app might be a bit better in terms of usability). But the UI and the ads are pretty much the same.
Which website are you referring to? I tried old.reddit on my mobile and fonts are so small (apparently it's the desktop website) that posts were barely readable. And if you use the new reddit website (which pretty much sucks IMHO), you could as well use their app, because it's literally the same (app might be a bit better in terms of usability). But the UI and the ads are pretty much the same.