If you have in iPhone, note that it has Garage Band. Before, I ignored it, but it’s easy to set it to some BPM, drop down a virtual drummer, and optionally turn on clicks on top of that… it has become my favorite metronome, and I wanted to mention that in case others might enjoy it as well. (I do use other metronomes as well, but Garage Band is pretty good.) The iPhone doesn’t do strange time signatures, just simple ones (3/4, 4/4, and 6/8).
So I went in a similar direction for my laptop, it runs Logic X and I use that as a metronome, except I also record myself and listen back, I think it helps a lot.
I’ve concluded that I always need some kind of click track; some people have great rhythm, but not me.