FFT Analyzer
Professional FFT Analysis
Only for iPhone
$4.99 · Designed for iPhone. Not verified for macOS.
iPhone
Analyze microphone input, audio, and video files with an FFT spectrum, waveform, waterfall, and oscilloscope — including peak, RMS, and clipping indicators.
FFT Analyzer is a powerful real-time spectrum analyzer for iPhone. It visualizes audio signals as a detailed frequency spectrum and waveform while presenting important measurements clearly.
In addition to live microphone analysis, you can import and examine audio and video files from the Files app or Photo Library. Control playback directly from the waveform while the spectrum and measurements are recalculated for the current position.
Key features:
- Real-time FFT analysis using the microphone
- Analysis of local audio and video files
- Import from Files and Photo Library
- Open compatible media directly from other apps
- Interactive waveform with position slider
- Play, pause, stop, and skip controls
- Peak, RMS, and clipping indicators
- Detection of dominant frequencies
- Adjustable frequency and decibel ranges
- Linear, logarithmic, and octave-based frequency axes
- FFT bars, spectrum trace, and combined display
- Waterfall and oscilloscope displays
- Persistence, peak hold, and other visual effects
- Customizable landscape layout
- Extensive smoothing and level behavior settings
- User interface in 18 languages
File analysis also provides information such as duration, sample rate, channel count, peak values, and prominent frequency regions. Analysis remains synchronized with playback so you can inspect individual sections precisely.
FFT Analyzer is designed for musicians, audio engineers, producers, educators, students, and anyone who wants to visualize and better understand audio signals.
Processing takes place directly on your iPhone for fast and independent audio analysis tailored to the current signal.
Export and reports
Analysis results can be exported as a CSV file. The export includes the app version and a timestamp, file details and metadata, technical audio data, overall RMS, peak, and dynamic range values, dominant frequencies, detected findings, and time-based RMS, peak, and frequency values for each analysis frame.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.1 adds analysis of local audio and video files to FFT Analyzer.
- Import from Files and Photo Library
- Interactive waveform with playback and position controls
- Live-calculated FFT spectrum during file playback
- Waterfall, oscilloscope, and persistence effects
- Improved frequency and decibel axes
- Modernized setup and new app icon
- Expanded localization in 18 languages
- Stability and display improvements
- CSV export with app version, timestamp, metadata, overall values, dominant frequencies, findings, and time-based measurements
The developer, LK software group, 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
- Kurenz Music GbR
- Size
- 3.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © Copyright 2026 - Kurenz Music
