Simple Spectrogram
Live audio spectrum & notes
Free · Designed for iPad. Not verified for macOS.
See the frequencies in the sound around you. Spectrogram turns your microphone input into a smooth, real-time spectrogram with a clear logarithmic frequency scale and Inferno colors.
• Watch sound evolve over time, with the newest audio at the top.
• Pause and tap any slice to inspect its frequency spectrum.
• Tap or drag on the spectrum to find nearby peaks and their exact frequencies.
• See the nearest musical note and the difference in hertz and cents, referenced to A4 = 440 Hz.
• Adjust the frequency range, noise floor, and contrast.
• Use portrait or landscape on iPhone and iPad.
Audio is analyzed on your device in memory. It is never recorded, uploaded, or shared. No account, ads, or tracking.
Musical note labels describe individual spectral peaks, which may be harmonics rather than a sound’s fundamental frequency.
The developer, DANIEL LAWRENCE LU, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DANIEL LAWRENCE LU
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Daniel Lu