>(I know you didn't ask for it but I am so excited that I learned something new, I can't resist :)). The author mentions the app ProHDR which cost the whole $1.99 so I may skip my afternoon coffee and go for it :).

That remembers an article I recently read; writer says "People pay 5$ for a coffee but don't want to pay 0.99$ for a mobile application". Seem you're not like that... :))

I never paid anything any IOS application (I just use free app of day application for buy apps.free) but almost every month buy 1/2 iPad game for my little daughter... Everytime she loves expensive games... :(