DOES NOT WORK – Frequency Meter PRO Review

DO NOT BUY THIS APP! I was trying to determine if the frequency on my keyboard was accurate (I can change the frequency on my keyboard). I’ve done this in the past with other frequency detectors. Even though you can actually HEAR the difference, this app does not register this change. For instance at A=440, the app says 441.39. When my instrument is tuned to A=300, this app says 441.39. Only when I tune to A=190 it changed to 417. So absolutely useless.
Review by rory0110 on Frequency Meter PRO.