What I personally do most on my phone is browsing the web (when not at home, at home I can do that with a regular computer). On Android I can use Firefox with plugins to block ads, kill overlays, etc... and especially it has the reader mode
AFAIK on iPhone you can only run one Apple-approved browser and all others are a skin around that, and it doesn't have plugins.
To me browsing the web is unusable without those plugins in Firefox. How is browsing the web on an iPhone? Do you get overlays, autoplaying videos and ads on websites or can you block them? Do you get a reader mode?