I tried it once, don't remember which app it was, but I was not impressed. I found that a usb oscilloscope interface to my computer worked better, though still not as good as a stand alone scope
Deb
Debra K
Eros 2Phono amp
BeePre2, Psvane ACME 300b
Kaiju, Linlai Elite 300b
Monamour 2a3 amps various tubes
Sota Sapphire, Pete Riggle Woody Tonearm, Kiseki Purpleheart Cartridge
Rega P6 Ania Pro cartridge
Roon Nucleus
MHDT Labs Orchid DAC
Jager speakers