I don't think I could run with a metronome--it would feel too much like work (or piano practice).
I do find my stride tends to synchronize with uptempo music. How about setting up a playlist with some faster and slower beats as a sort of interval training?
Thanks. I don't like to have earbuds in when I'm running so I don't really use music. The metronome sounds from my phone which I strap to my arm so I'm not hearing it all the time - particularly when I'm nearer traffic. It's a bit irritating at first but once I get into the pace it's OK.