I shoot soccer games for a high school, and with a different photo sharing site, I've been able to share a link with the parents and athletes, and they are able to "Add to Home Screen" so the gallery appears to look like an app on their iPhone, and they can always just click on that instead of using a bookmark. That way I can just upload after each game, and I never have to tell them - they're just always there.
With picflow, it appears to add an "app" on the home screen, but the download functionality doesn't work when I access the galleries that way. Is this something that can be added in the future?