FNam FFT Spectrogram Analyzer

Utilities

Free · Designed for iPad

■ Turn your smartphone into a professional audio analysis tool [Video Guide - See it in action] https://youtu.be/72SYLTG0l_8 FNam Audio & FFT Analyzer is a precision tool designed for sound engineers, researchers, students, and audio enthusiasts who need accurate frequency analysis and data logging. ■ Exclusive Features (Why FNam?) Unlike typical sound meter apps, this app offers advanced features like Dual File Comparison and CSV Export, enabling detailed post-analysis of audio data. ■ KEY FEATURES 1. Real-time Audio Analysis • High-precision FFT (Fast Fourier Transform) Graph. • Time Domain Waveform (Oscilloscope) view. • Fluid Spectrogram for visualizing frequency changes over time. 2. Dual File Comparison (Exclusive Feature) • Simultaneous loading of two WAV files for comparative analysis. • Spectrum Overlay: Visually compare differences using color-coded traces (Blue vs. Magenta). • Instant Calculation: Provides Arithmetic Mean and Mean Difference between signals. 3. Data Logging & Export • Flexible Sampling Rates: Supports various rates (4000Hz, 8000Hz, 16000Hz, 22050Hz, 44100Hz). • High-quality Recording: Audio is recorded and saved as WAV files, strictly matching the selected sampling rate. • Raw Data Export: Exports raw PCM data to CSV format. The exported data maintains the exact sampling rate and duration, making it optimized for post-processing in Excel, MATLAB, or Python. • File Management: Files are stored in the 'Download\FNamDoc' directory. - WAV naming format: Date_Time_SampleRate_Channel.wav ex) 20260219_164715_44100Hz_Mono.wav - CSV naming format: Selected WAV file name_SampleRate_Duration(s).csv ex) 20260219_164715_44100Hz_Mono_44100_5.2s.csv 4. Professional Configuration • Window Functions: Selectable Rectangular, Hann, Hamming, and Blackman windows. • Frequency Weighting: Supports A, B, C, and Z (Linear) standard weighting filters. • Axis Control: Supports both Auto-scaling and Manual range settings (Hz / dB) for precise graph inspection. • Calibration: Independent offset controls for FFT and Time Domain to ensure alignment with professional reference equipment. • Max Peak Hold: Displays and holds the maximum amplitude values across the frequency spectrum. ■ TECHNICAL SPECIFICATIONS • Signal Processing: Anti-aliasing filters are automatically applied during downsampling to ensure measurement accuracy. • Sampling Rate: Supports standard rates up to 44.1kHz (device dependent). • Standards: Implements IEC 61672 formulas for accurate weighting calculations. Note: While this app uses IEC 61672 standard formulas, measurement discrepancies compared to professional equipment may occur due to the hardware frequency response limitations of the built-in smartphone microphone. For critical measurements, the use of a calibrated external microphone is recommended.

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- Updated default offsets (FFT: 115, Time: 110) - Fixed minor bugs

Version 1.2

The developer, YEON SEOB KIM, 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 Collected

    The developer does not collect any data from this app.

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

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Provider
      • YEON SEOB KIM
    • Size
      • 2.8 MB
    • Category
      • Utilities
    • Compatibility
      Requires iOS 26.0 or later.
      • iPhone
        Requires iOS 26.0 or later.
      • iPad
        Requires iPadOS 26.0 or later.
      • Mac
        Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Languages
      • English
    • Age Rating
      13+
    • Copyright
      • © FNam
  • Developer Website
  • Privacy Policy