I am using an iPad Air 2 64GB and plan to move my RAW workflow from my PC to my iPad. Unfortunately my iPad struggles as soon as I use the noise reduction filter in the Photo Persona. After several crashes I tried to return to the Develop Persona (I am processing RAW files) but without success, since the app crashes there, too.
So the steps I do are:
Apply the filter on the pixel layer (Photo Persona)
Zoom in to get a closer look on darker areas of the photo which contain noise
Use the "Before/After"-Splitscreen to get an immediate look at the results
Apply some adjustments to the filter
After some adjustments the app crashes. The noise reduction also applies a little slow, but I can come to terms with that since I am using an older iPad with less CPU power.
And for some more background information: I am using a Nikon D5300 and I mostly process the .NEF files of it, which get spoted via iCloud Drive and Photos app without a problem. Maybe I should add that I am currently using the iOS11 Beta build 4...But I had problems like that with iOS10, too, but it didn't matter at that time since I was only trying to process some test shots at the beginning.
I was looking for a similar topic on the web and via the forum search but couldn't find anything like it, so I suggested starting a new topic is okay.