I'm sorry but the news is that you are NOT actually editing a RAW file. It will LOAD it but any work done on it is done to hi res jpg ( if you preserved resolution and file size by using camera connection kit). Actual editing of RAW file is in the future I would suspect though...for mobile. This is a vaguely covered aspect of ipad editing...seems most apps don't mind the confusion. What is apparently amazing to me is that even after heavy editing in snapseed the histogram does not show gaps...I take that to mean tonality has not been posterized....but find it hard to believe from jpg editing.
@moentimothy1 yes that is true. I've been meaning to amend this article. To state the fact.
@tristanjud @moentimothy1 Frankly, can hardly wait till actual RAW editing comes to ipad etc. This issue is vague and confusing to people right now though. Also, re-read my post and should have gone back and checked the odd spoken word type syntax...barely made sense.
I have learned though that about the only way to be sure you are even getting an original res JPG file imported to iPad is to use camera connection kit. Otherwise, something somewhere will change your res and file size to something IT thinks is better for you. Annoying.
But, to me, what Snapseed editing can do to a hi res jpg is nothing short of amazing and I don't see problems with gaps in histogram. A Great Leap Forward or am I missing something? But can, what looks good edited in JPG on iPad, actually be printed successfully....?