Hockney uses several applications, including one called Brushes, to draw the pictures.
He prefers to use his fingers rather than a stylus. Different fingers are used for varying effects, and even though he is right-handed, he often draws with his left hand, giving the final works a quality that he'd have difficulty replicating with his stronger arm.
The results throws up questions about the very nature of "originals" and "reproductions", and the value - aesthetic and monetary - of the work. As yet, Fresh Flowers are not for sale.
The technology brings a new dimension to the gallery, and both he and the curator Charlie Scheips, believe that they are at the beginning of an artistic revolution for professionals and amateurs alike.
"Even though some of the tools may be too advanced for the novice or amateur, they are still extraordinary and well worth exploring," says Hockney.
And although the colours may not be as rich as that which he might conjure from oils with a paint brush and palette he still marvels at what can be achieved.
"It's a real privilege to make these works of art through digital tools which mean you don't have the bother of water, paints, and the chore of clearing things away," he says.
"You know sometimes I get so carried away, I wipe my fingers at the end thinking that I've got paint on them."