Best on a tablet. Text is too small to read and buttons too small to tap on smartphone. Data is lost upon rotate landscape/portrait. Not enough exponential averaging between FFT bins. No way to calibrate app with cal file, but you can export data as CSV file and then do your own calibration vs known calibration mic in a spreadsheet.
If it has option to DFT the earphones audio it will be damn perfrct
Keuwlsoft quality ! Maybe next sound project for audio recorder in professional style (TASCAM, ZOOM, ..) ??
Slow... sluggish... delayed response.... Not good.
Lol no Fry
Frequency and time analysis with a decent variety of basic algorithms.