Im pretty much buckled up and ready for my holiday in South America, although theres still something i havent got resolved yet, and thats geotagging of my images ill be taking during my holiday.

I have been looking at different solutions, which is standalone units and smartphone applications. But honestly i dont have experience with this and how good the different software are when tagging a few hundred of images or more.

What do people use and do you find it robust?