I would like to use Lightroom for i Phone app to have a temporary travel backup of my photos (canon 6d raw) on my iPad.
I do not know whether Lightroom app imports full raw files on IPad or reduces them some way.
Lightroom does not import the full size image, however Lightroom imports smart preview of the image which are much smaller in size.
Also you may check the following link for more information: Adobe Lightroom for mobile FAQ
Let me know if it helps.
Lightroom CANNOT import raw files from your iPhone roll. It can only get raw files from your desktop machines and then only in reduced resolution. There are tricks around it and it does work on Android but only for raw photos shot with the phone's camera, not for raw files from a DSLR that you import to its photo roll. Read more here: Lightroom Mobile and Raw files in Camera Roll