Canon has released DPP (DPP Express) for the iPad and can be downloaded for free from the App Store ...
I should mention this is CR3/JPEG only, currently no support for CR2 images and the camera needs WiFi.
Thanks Don. Would have liked to give it a try but my Canon, of course, takes CR2 and doesn't have a wireless connection!
I also would have liked to give it a try ... but... I don't have an iPad but do have CR3 & WiFi