FFTSensor

this one is difficult to use since it lacks the ability to use mouse cues on peaks to find their exact frequency. I'm not sure if it has peak hold (till reset pushed) but that's another issue which makes the first issue a non issue if it can't hold peaks in the first place.

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FFT is limited to 100 Hz. pretty much useless for my needs... 😕

Just re- installed it. Still no display. Android 11, Realme C30,RMX3623

Simple to use, straight to the point

This is the best vibration frequency analysis tool I have found so far. Could do with an keep screen on setting. And maybe autoscaling on the upper graph.

Simple straight forward. Data. Logger. Excel file. FFT. Free