I use GPS4cam. Simple enough app that works well. Yes it drains battery power but all gps type devices will. It has several acuracy settings and works out of country. Also a quite cheap solution
http://www.dslrbot.com/this works well too
Quote from: wickidwombat on April 01, 2012, 08:50:12 PMhttp://www.dslrbot.com/this works well tooDoes it send the info by IR so the photos are tagged in real time? Do you know of any iPhone apps that could do this?Does anyone know if you can connect your iPhone over bluetooth if you plug in a USB-bluetooth adapter into the WFT-4a?http://www.bhphotovideo.com/c/product/542685-REG/Canon_2553B002_BU_30_Bluetooth_Adapter.htmlhttp://www.amazon.com/Belkin-Mini-Bluetooth-Laptop-Adapter/dp/B001E96JBK/ref=sr_1_4?ie=UTF8&qid=1333599137&sr=8-4