I find that WP as it is doesn't work very well on a smartphone. I find myself constantly having to zoom in and out so I can click on things or read text, editing posts as I write them is annoying, and when I open more than a couple tabs, my ram usage shoots up and sometimes ends up crashing my browser (to be fair, I am using Firefox mobile with a few addons, not the lightest browser as it is, but I like my addons). It's not impossible to use but it is a hassle, and it's very clear it was designed to be used on a desktop browser.
To anyone here with an Android phone, I find that I can prevent WP from crashing by using a swapfile, but you can only do this if your phone is rooted, and it also carries the risk of wearing out the read/write cycles on your SD card or internal memory.