My workflow is entirely iPad and iPhone due primarily to the stability of the software. My experience of Android is less extensive but mixed.
https://www.amazon.co.uk/Apple-10-5-inch-iPad-Wi-Fi-64GB/dp/B072K6NR4B/ref=as_li_ss_il?s=electronics&ie=UTF8&qid=1551255377&sr=1-22&keywords=iPad+pro&linkCode=li2&tag=madeonamobile-21&linkId=c41cf7b8372782708e17a738157230e1&language=en_GB