Hiya - it should work on an iPad and iPhone assuming your vault is synced somehow. Having said that, some features like drag and drop of columns to re-order them wont work as I have not added anything specific to handle drag events. Also, I have done nothing with the layout to make it better on smaller screens so you get the same ‘big-screen’ experience - so it might be a bit janky on a phone.
All the basic features should work fine tho. I will be looking at mobile specifically at some point in the future to fix the things that don’t work (like any drag and drop functionality) and to give a better small screen experience. In practice this will be quite a way out as the current work I am doing on drag and drop for cards is going to take some time to complete.