Sound Analyzer Free is a simple spectrum analyzer with fine frequency resolution.
Although the free edition shows advertisements you can use all of the features the paid version has.


Features:
- Widely configurable parameters
- Logarithmic scale and linear scale are available for frequency (horizontal axis).
- Zooming and scrolling by touch operations
- Both of portrait/landscape orientations are available.
- Real-time display of peak frequency and amplitude (max 10)

Analysis parameters:
- Max frequency: Selected from 96kHz - 1.38Hz (it depends on the model of device)
- Min frequency: 50Hz 25Hz 10Hz 5Hz 2.5Hz 1.0Hz 0.5Hz 0.25Hz
- Refresh rate: 45fps 30fps 15fps 5fps 1fps

I hope you to enjoy Sound Analyzer!