bismark bs-spectrum 4+

Spectrum Analyzer

bismark LLC

    • 2.3 • 3 Ratings
    • $3.99


bs-spectrum is a simple FFT spectrum analyzer application.

This application calculates FFT (Fast Fourier Transform) of the sound which is recorded by the iPad & iPhone's internal mic. The calculated data is displayed as graph.

Option Setting:
- Mode: Linear, Logarithmic
- Window: Rectangle, Hamming, Hanning, Blackman
- Decay: 250[ms], ... 4[s]
- Amplitude Offset

Ratings and Reviews

2.3 out of 5
3 Ratings

3 Ratings

William Cheyne ,


I like the app,nicely done, but I would really like to be able to specify a number of samples and then average the amplitudes at each frequency ... This would enable me to pick out dominant frequencies and get rid of the random noise.

History-Mike ,

Very clean App.

Developer has used the "keep it simple stupid," (KISS) development mode. Easy simple intuative interface. Works well on M1 Mac mini. With a wide variety of USB microphones, from the cheap low end, to pro level mics. Vaery basic, but very well worth the money. Would be nice to vary the FFT bin levels. CUDOS to the develolper!

arrogantb ,

gives real frequency info!

Other cheap similar apps only make pretty pictures.

This one gives you labels and you can tap at a spot on the chart to see the corresponding frequency.

Highly useful for basic audio analysis.

App Privacy

The developer, bismark LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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