"In 2009 Hockney began “drawing” this view on his iPhone (above), with just his thumb. “There was great advantage in this medium because it’s backlit and I could draw in the dark,” he writes in MY WINDOW (Taschen, $150), a collection of 120 digital still lifes he completed between 2009 and 2011. Plus, he never had to leave his bed."

https://www.nytimes.com/2022/11/18/books/review/david-hockney-my-window.html