I use a customized set for terminal/IDE and like Aile for documents. Etoile is neat. Feels typewriterish. All covered by the SIL Open Font License.
It's not Iosevka (really, what else can come close except maybe Envy Code R), but I have recently discovered Victor Mono and think it an attractive programming font: https://rubjo.github.io/victor-mono/
Not OP, but I like PragmataPro [0] by Fabrizio Schiavi and use it in my IDEs. I particularly appreciate his attention to glyphs in languages other than English, and how nice it looks (IMO) for console interfaces and box drawing [1].
What's the difference between app and website aside from the huge price increase?
You'd have to ask Fabrizio. I assume desktop is the cheapest because it's just you, and app/website is more expensive because there's some nontrivial risk you expose the font files in a way that others can get them for free.
Of course you'll expose them. It's not a risk, it's how things work.
I mean "expose" in the sense that you might expose the files in an unlicensed way, not just that the files are available.
His licensing model is somewhat confusing to me to be honest.
I used his Triplicate monospace font as my main IDE/terminal driver for about a year, and I think in a couple of logo sketches. His other fonts look good as well, if I get to do more visual design again I might get some of them too.