I tried leptos for a bit a few months ago, but I ran into some internal bug on the framework on an example code provided by them, which caused me to get stuck pretty early on. (I haven't tried it since, it is possible that they have improved since then). I haven't looked into sycamore, it looks interesting. I don't know if they have cross-platform support beyond web applications (which is something that interests me in Dioxus). Between the two I have tried (Leptos and Dioxus), Dioxus felt more stable/polished. Have you tried those? What are your thoughts on the different Rust UI frameworks?