Spectrum: Audio Analyzer
Real-time FFT spectrum
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Spectrum turns your phone into a modern real-time audio analyzer — the clean, fast tool that older spectrum apps never gave you.
See sound the moment it happens: a live FFT frequency spectrum and a scrolling spectrogram (waterfall), with automatic peak detection and the matching musical note. Built for a phone screen, with a beautiful dark and light theme — not a cramped desktop port.
WHY SPECTRUM
• Modern, readable interface — designed for touch, dark & light themes
• Save your measurements and revisit them anytime (most analyzers forget everything the moment you close them)
• Export the spectrogram as a high-resolution image, or your data as CSV
• Real peak frequency + musical note readout, in cents
FEATURES
• Real-time FFT spectrum, log or linear frequency axis
• Spectrogram (waterfall) view
• Peak hold and peak-frequency tracking
• Musical note detection (A4 = 440 Hz)
• A-weighting for perceived loudness
• Adjustable FFT size (2048 / 4096 / 8192)
• Save, name and organize measurements
• Image & CSV export
• 8 languages
Everything is processed on your device — no audio is ever uploaded. Microphone access is the only permission needed.
Perfect for musicians, audio engineers, students, DIY speaker builders, hum & noise hunters, and anyone curious about the sounds around them.
Remove ads with a single one-time purchase.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Minor improvements and stability fixes.
The developer, SEONYONG LEE, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SEONYONG LEE
- Size
- 28.7 MB
- Category
- Music
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $5.99
- Copyright
- © 2026 hedvion