Record GPS tracks and Geo-tag Photos on iPhone
I like to keep my photo library organised, which includes location information to all photos I take with my big camera. However, my cameras don't have GPS and connecting the camera to the horribly Fuji app is no fun. Instead I run a GPS tracker app while tacking pictures and then export a GPX file.
Minimalist GPS Tracker is a super simple GPS tracker that uses barely any battery and can export GPX.
After I'm done with taking photos I use the Lightning to SD Card Camera Reader to import the photos to my iPhone and than use an app called Geotag Photos Tagger (GPX) to import the GPX file I recorded earlier and match the photos to the location using the timestamp. Because the mapping happens based on the timestamp it's important to set the correct time on the camera. If the time is off, I use the Adjust Date & Time functionality that the native Photos app added a couple of years ago.
Sometimes I forget to start the GPS tracker or I need to adapt some location manually and I find the Metapho app very helpful in these situations. It allows me to filter my photos to show me only those with no location and add a location to photos based on the location of the pictures taking around the same time.

