There's a free app for Android phones (so I assume also for Iphones) called ISS Detector which lists all ISS passes, filtered for location and magnitude with optional warning alarms etc. Iridium Flares get a mention also.
There's another handy app called PrediSat which gleans info from HeavensAbove, again filtered for location.
As a bit of a satelite junkie, I reckon they are both worth having ....
EDIT: Honest to God I just posted that and my phone jingles a warning for Iridium 37 at -5.1 mag at 17.31 LOL
EDIT EDIT - 15 degrees elevation! No chance from here!
