Easy peasy geotagging
Geotagging couldnt be any easier. gps4cam works perfectly and is easy to use (once you figure out how to "export" a trip by photographing the QR code and including the image with all the photos to be geotagged).
The only tricky bit is getting a good quality shot of the QR code. Reflections on the glossy iPhone screen can obscure parts of the code, rendering it useless. I take about three photos just to be sure I get one good one, and then I boost the contrast in Photoshop and correct any perspective distortions before running it through the gps4cam desktop app.
Drdul about
gps4cam - Geotag Your Photos, v6.0.3