iPhone log files?

My app runs ok using Unity Remote, but when I build and install and run on my device, it hangs when entering the level. I could probably figure out what's hanging if I could read the log file I've known and loved (the output_log.txt found in the _data folder on PC).

Is there such a thing on iPhone/iPod? If so how would I be able to read it? Or is this in XCode somewhere?

If you're launching the game from XCode with the device attached to the computer, you can bring up the console using Command + Shift + R which will have a realtime debug output. All your calls to Debug.Log() will appear here, along with any NSLog() or printf_console() commands entered in your Objective C code.