Another kind of choice is the use of Audio Tools (Android) plus a calibrated microphone. I'm not sure what the equivalent is on iPhon/iPad.
$20
Frequency response measurement
Hi all, I want to measure the frequency response of my stereo system at my listening position. I am trying to avoid a bunch of research. Looking for suggestions on a mic and PC software or meter. I will use reference tones from the stereo. I am planning on measuring the amplitude on a set of frequencies then use a graphic equalized to flatten out the frequency response.
Thx, Del.