The thing that sets this app apart from the others is the timing device we built into it. The app will figure out the amounts and drips per second. But, going beyond the normal apps, it also gives you a metronome that accurately gives you the beat of the drips per second.
There is no need to look at your watch and try to figure out how many drops per min. That is archaic and old fashioned. We live in the 21st century; let technology give you the upper edge.