Not professional at all

A very basic app: It gives you a frequency, though it usually gives the wrong frequency, and it even shows a different frequency when switching from the Wave to the FFT display. It also doesnt have 1 Hz resolution (i.e., when reading a frequency sweep, the reading goes 35, 47, 59, 70, 82, 94, etc). With complex waveforms it doesnt always seem to read the loudest frequency). With a pure since wave (which displays on the Wave screen), the frequency is wrong, and the number jumps way up and down. As for dB reading, there are no options for weighting, and the author doesnt say what they use, so you dont really know what the number represents. I didnt test the accuracy because there is no point. This app is extremely inaccurate and effectively useless; there are many other apps that are free and offer far more (including accuracy), this app is nothing but a fun toy at best, not a professional tool as described.

MasterFR about FreqCounter, v1.4