Rather pleased...
Ive only had this app for a minute or so now, but it works well. It is a bit odd, in my opinion, how the frequency only shows up when a tone is being played. Backround noise will not show a frequency. This makes sense, of course, but I wish it said something like "Frequency: --" instead of merely a blank spot where the frequency goes. I was very pleased to find that it actually said the note name in addition to the frequency, like A# or whatever. I have yet to test it with a piano, but with whistling notes, it appeared to respond rather well. All things considered, an excellent app.
This Name Is Now Taken about
Frequency Counter Pro