Saving photos to iOS converts raw to jpg



I am using the free trial version of plex. I am interested in being able to move photos from my server pic to my iPad. The problem I am having is that when I save the photo to iOS photos it is converting the raw file into a jpg. If I were to purchase the iOS plex app and use the sync function would that save the file in the original raw format? Saving the jpg is no good to me.