Not bad but the needs better instructions

Download it on your Iphone then go to the web sit and get the GPS4 cams for your computer ,turn on the software on your phone export take a picture of the bar code on your phone with your camera you want to geo tag ,use the software on you computer to tag the photos select the card reader and files on it do it twice then upload to iphoto.

Steve oliphant about gps4cam - Geotag Your Photos, v5.2