Been using Engine RPM for a couple months now. It’s basically an app that listens to your engine’s sound and tries to calculate the RPM. Pretty solid if you’re into that kind of thing.
Here’s what you do – just hold your phone near the engine and it’ll start measuring. There’s also a graph that shows the RPM over time, which is pretty cool. And you can save readings and check the history – took me a while to figure that out but it’s useful.
Look, if you’re into cars or motorcycles, you’ll probably like this. It’s not perfect – the accuracy can be off depending on the engine noise and it doesn’t work great for engines with mufflers. But overall it does the job. Worth checking out if you want to geek out on your engine’s vitals.
