Sport Armband

Ok so I'm in a bit of a fitness craze . I started running again. Back in the olden days there were fanny backs to carry my battery operated CD player . Remember those? Well now that I turned in my flip phone and opted for an iPhone -I found as I run I was turning my music into shuffle mode???Holding a phone while running was not my cup of tea or joe which ever you prefer. Well,my in the know,14 year old Julia suggested a sports armband. It's a painful $20 at Target I figure its another expense I could classify as a need not a want .
Anyone out there try one of these?