The only problems I had is that it doesn't work on Android 7.0
Very accurate(because it can be calibrated).
Amazing app and improve more
Good, simple app
Works as GEIGER COUNTER! :D I made a wire that feeds the output audio from my Geiger counter into the mic input on my phone. I was then able to use this app to count the incoming clicks in both Hz (clicks per second) as well as a nice total clicks counter. For example if I get a sample that gives me a reading of 75Hz, I can work out by multiplying the frequency by 60 that it's giving off 4500 counts per minuet. I'm very happy I found this app. What a gem.
Audio Tone Generator 20 - 20 000 Hz. Perfect for testing or pranking!