As much as I am obsessed with my DSLR camera (and believe me I am OBSESSED!) I also love taking photos on my Iphone too. It's so quick and simple and very much ideal for when you're just 'in the moment' (dontcha hate that phrase ha) and want to take a quick capture of something you or your child is doing.
I have three photo apps on my phone that I'm going to talk you through as they are my 'go to' apps. Between them they cover every single thing I need to do with my snaps and because of this I've never needed to download any other.