FrequencyCat

Turn your photos into sound

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Hide an image inside sound. FrequencyCat is a playful tool for exploring the connection between images, sound, and spectrograms. Choose an image, and FrequencyCat transforms it into a unique audio signal. Play the sound and view its spectrogram, and you’ll see the original image emerge again from the frequencies. With FrequencyCat, you can: - Turn images into sound - View audio spectrograms in real time - Play sounds and reveal the images hidden inside them - Explore how different images create different sounds - Discover the relationship between sound, frequency, and Fourier transforms in an intuitive way There’s no magic behind it. Just frequencies, phases, an inverse Fourier transform, and a little curiosity about sound. Whether you’re interested in acoustics, music, signal processing, or simply wondering what an image might sound like, FrequencyCat gives you a new way to explore. Pick an image. Hear what it sounds like.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

This update brings a refreshed experience for exploring sound and images: - Improved spectrogram generation and visualization - Refined image-to-sound and sound-to-image workflows - Improved real-time audio spectrum viewing - Updated interface and interactions - Improved performance, stability, and compatibility with newer versions of iOS - Fixed several known issues

Version 2.0

The developer, Xuesong Zhang, 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, for example, based 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

    Seller
    • Xuesong Zhang
    Size
    • 2.8 MB
    Category
    • Music
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 8 more
    • English, Dutch, French, German, Italian, Japanese, Korean, Simplified Chinese, Spanish
    Age Rating
    4+
    Copyright
    • © 2026 Xuesong Zhang
  • Developer Website
  • Privacy Policy