There’s no platform icons on iOS (and maybe android, but I don’t have a device to test that). That means I can’t check the world before joining, which for some people is a problem. I think the browsing outside of the game (but inside the app) should be similar to the browser version or at least have an ability to check the world in the browser. Apart from that, it’s good to check your friends or worlds before joining the actual game, but lack of platform icons for is a bit annoying.