On my Android phone, the LR app can use the phone's RAW capability which would be good for some people. I use LR mobile to simply take a shot where I'm shooting, which of course gets synched with LR back at home. Purpose being for me that I then have a pretty exact GPS location to copy into my actual photos. I have used Geotag Pro too, which is very good but both thses methods have the obvious fault of the GPS "built-in" slight inaccuracy, a pain when you have a lot of shots not quite showing in the right spot in LR's MAP module.