Question is SPECIFICALLY to experienced day traders who have been day trading for several years and spend AT LEAST four hours a day trading.
Not a bad idea to do a poll actually if you want to gather some kind of data and opinions.
And a small suggestion, if you want only experienced day traders to answer, it is much better to put some kind of a hint in the title because not everyone actually reads the OP and they jump directly into replying.
Now since I am here and I have done day trading a lot maybe not as experienced as you are looking for though, I always prefer trading on my laptop because mobile is just too small and congested to understand things properly and I haven't traded on a tablet yet so don't know about it.