My mom just gave me her old 3G iPhone. I have no intention of using it as a phone, but would like to use some of the apps available to filmmakers. Having never really looked into the iPhone, I'm not really aware what is out there but thought folks here might have some good recommendations. I work as a camera assistant, production manager and a wear a couple different hats on set, so anything that applies to production could be right up my alley. I've seen a few depth of field calculators already and a couple apps to assist with cg, but would love any and all opinions. Thanks.