Good start – The Roll - Automatically organize and find the best photos in your camera roll Review

To all those who complain that it takes too long and requires Wi-Fi, keep in mind that what this app is trying to do is extremely sophisticated and requires beefier computers than you have on your phone, so most of the heavy lifting is probably being done on their machines. This is a cool idea and the technology will only get better in the future, but this app as it is today is not ready. Like other reviewers have said, the accuracy is only so so, wavering between eerily astounding to laughably awful. It's kind of fun to see your photos sorted in strange and sometimes useful ways, but real humans don't tend to want too see all photos about, say, "water" together. Interesting to play with, but quickly deleted this app.
Review by Jkoseattle on The Roll - Automatically organize and find the best photos in your camera roll.