Great, accurate simple to use app. Would love to see additional features like variable integration time, scalable amplitude, zoomable to band of interest. Same features as an expensive audio spec an, not asking for too much am I? And yes, worth paying for to me.
Great app What a wonderful look into the invisible world. The waves from the lake ( great ) down the street are poetry to listen too but take on a whole new meaning with this. The fridge is pretty cool too...
This works very well for determining the precise frequency of an unknown source with multiple harmonics (like a musical instrument, or the buzzer component in SHENZHEN I/O.)
amazing, it's actually really accurate - checked with sine tone generator on xiaomi redmi 4 phone. the frequencies are exactly as shown.
Great app! Might I suggest external mic input to make it more sensitive
Instant feedback on learning to whistle a perfect 2600Hz.