Comment by hellofunk

Depends on your needs. If you are targeting desktop, there are a couple of UI libraries for Elm. However, they are buggy when you try to test them out on a mobile tablet. I have found that most Elm developers create their own UIs since wider access to JS UI toolkits is not easy. That does mean that you need to enjoy general web design or work with a designer, or be willing to put in extra time when working in Elm.