BPM = Beats Per Minute (not measure) which corresponds to tempo. That is, how fast the song is, not how bouncy or syncopated. I suspect Nate's "Waltz of the Walking Wounded" would confuse some automatic software but others would just figure out the timing.

A longer list of software, updated in September (it claims) is here.

While I can see the utility for dance and exercise, I can mostly ignore BPM. So far, anyway.