This is a great idea but I think with a few tweaks it could go from a good app to a great app. First there are very few pictures (5 I think?) and they always play in the same order. Second, I agree with the previous reviewer, it would be great to be able to import your own photos to "uncolor". Adding sound would also be a great improvement.
At this point this app is more at the free level than the 99 cent level.
Looking forward to updates.
heather206 about Uncolor for iPhone