I am using the free app GeoTagr on my iPhone 5 to tag Fuji photos in Lightroom (I email the tracks to myself from the phone). Seems to work very well. The battery on the phone is not what it used to be, so it's only safe for a half days shooting at this point, but for full days I put a Lenmar BC5 battery extender I got on Amazon for under $30 on the phone. I used to use a Garmin eTrex as a logger, but don't bother any more as the phone works so well and it's one less thing to carry around.