I use iOS and One UI (Samsung’s version of Android) on a daily basis, and don’t really think one OS is better or smoother than the other. they’re completely different, but both really good in my opinion. There are certain features on each that I prefer but not enough so that I have a strong preference between the two. I don’t use a lot of social media apps and prefer web-based Facebook when I have to use Facebook but I do think Instagram is better on iPhone. I prefer the back universal back button on one UI and miss it when I’m using my iPhone. I hadn’t really thought about one being more addictive then the other, perhaps because One UI also has really great features and seems addictive as well,at least for me.😅