iPhone Screenshots


The application is designed for analysis of a sound spectrum in real time (with a microphone). Besides, the application can be used as a measuring instrument of noise level (not for exact measurements).

• Sound wave.
• Fast fourier transform (FFT). FFT size: 2048 (the accuracy of determining the frequency of ±12 Hz), 4096 (±6 Hz), 8192 (±3 Hz), 16384 (±2 Hz), 32768 (±1 Hz), 65536 (±0.5 Hz), 131072 (±0.2 Hz).
• Linear and logarithmic frequency scale.
• Linear frequency scale with maximum details (there is a choice for the displayed frequency range).
• Linear and logarithmic amplitude scale.
• Octave bands (1/1, 1/3, 1/6, 1/12).
• Window functions (Blackman, Hamming, Hann (Hanning), Blackman–Nuttall, Sine window).
• A- and C-Weightings.
• Peak hold.
• Peak frequency detection.
• Values of any point (for linear frequency scale, octave bands and sound wave (at maximum detail)).
• Sound level meter (dB SPL). You can calibrate your microphone by launching a signal generator with a sinusoid frequency of 1000 Hz on another device and making the volume very low. When the sound is almost inaudible, it is necessary to find the amplitude for the frequency of 1000 Hz on the spectrum (FFT size: 16384). This value should be multiplied by 1.2 (to compensate for spectral leakage). It will be the reference value for your microphone. ESTIMATE THE TOTAL NOISE LEVEL BY USING THE SOUND WAVE MODE AT THE MAXIMUM VALUE.
• Sample rate: 48000 Hz.
• Taking a screenshot by lightly touching the screen.
• Export data to a WAV or text file ("Y=[y1 y2... yn]", "y1;y2;... yn", "x1;y1\nx2;y2;..."). Number of points is adjusted via "FFT size".
• Automatic stop in the sound wave mode (when increasing or decreasing signal strength).
• Test wave.

What’s New

Version 1.1

• FFT size: 2048, 4096, 8192, 32768, 65536, 131072.
• Logarithmic frequency scale.
• Octave bands (1/1, 1/3, 1/6, 1/12).
• Window functions.
• A- and C-Weightings.
• Peak hold.
• Values of any point.
• Test wave.


Dmitriy Kharutskiy
3.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.


English, German, Japanese, Russian

Age Rating
In-App Purchases
  1. Full version £1.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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