I’ve been using liveBPM – Beat Detector for a couple months now. It’s basically an app that can detect the tempo of music playing around you and show you the beats per minute (BPM). Pretty solid app if you’re into music production, DJing, or just nerding out over beats.
Here’s what you do: you just open the app, it’ll start listening through your phone’s mic, and it’ll constantly display the current BPM. There’s also a history graph that shows the tempo over time, which is pretty cool. And you can tap a button to get the average BPM for the last little while – took me a while to figure that out but it’s useful.
Look, if you’re a drummer, musician, or just into that kind of thing, you’ll probably like this. It’s not perfect – the beat detection can be a little wonky sometimes – but overall it does the job. Worth checking out if you need a simple BPM monitor.