I love Nuvio!!
I got Nuvio back when it first released and loved the approach it takes. It's such a better UI compared to Stremio and really feels like a real streaming service. I love the customization features you can do directly inside the app instead of some weird workaround you'd have to use for Stremio. The quality of life features (like downloading) are also amazing and it baffles me that they aren't on Stremio.
My only complaint is it's availability. You can only really get it on android and android TV. I'd love to see it on IOS and MacOS so that my family can use it. Even a windows version would be great. I know Nuvio is developed by a small team with limited funding and there's only so much they can do. I think a simple web version, even with limited features, would be amazing for the availability problem.