No, I am not claiming that I can edit as well on my tablet. What I am saying is that the quality of the tablet (300 PPI resolution and decent enough color accuracy) and the quality of the PhotoMate app is allowing me to accurately evaluate the quality of my images. Having satisfied myself that I now have a good image, I will later process it on my home PC. I print my best images and the tablet and apps are not suited for that.
I have installed SpyderGallery on my tablet, which is free from DataColor but you need the Spyder 4 to use it, and it profiles your tablet. However, you can only use it by looking at an image from within the app, I.e., you can't use your profiled display to then edit your image in other apps.
One again, PhotoMate is so fast and easy to use, I won't hesitate to transfer nef files to it in the field as opposed to the much bigger effort of using my older, low quality laptop which gives me less valuable results.
There is a free version of PhotoMate. Anyone potentially interested should try it out and see for themselves. Or, own the full version for 15 minutes and get a refund if you don't like it.