Developed without compromise, Affinity Photo for iPad is the first full blown, truly professional photo editing tool to make its way onto the Apple tablet. Built from exactly the same back-end as our award-winning desktop version, and fully optimised to harness the full power of the iPad’s hardware and touch capabilities. Affinity Photo for iPad offers an incredibly fast, powerful and immersive experience whether you are at home, in the studio or on the move… More here.
I would say to get it while it is discounted, but you should get it anyway if you have a need for such an app. It’s incredible.