# Spectrum: Audio Analyzer — Real-time FFT spectrum

> Real-time FFT spectrum (iPhone/iPad app by SEONYONG LEE.)

- Source: https://appshunter.io/ios/app/spectrum-audio-analyzer/id6787894411 (this page in markdown: same URL + `.md`)
- Developer: [SEONYONG LEE](https://appshunter.io/developer/6775892940)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 89 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, European Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2026-07-15
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/spectrum-audio-analyzer/id6787894411/reviews.md

## What is Spectrum?

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
• Works on both iPhone and iPad
• Real peak frequency + musical note readout, in cents

FEATURES
• Real-time FFT spectrum, log or linear frequency axis
• Spectrogram (waterfall) view
• Tap the chart for a frequency cursor with dB and musical note
• 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

SPECTRUM PRO - one-time purchase, no subscription
• 1/3 octave RTA view with per-band peak hold - the classic real-time analyzer used for live sound and room tuning
• Tone generator: sine tones, 20 Hz-20 kHz logarithmic sweep, white & pink noise for testing speakers and room acoustics
• Peak list: the strongest peaks with harmonics tagged
• Up to 4 frequency markers on the chart
• Calibration offset (±20 dB) to match a reference meter
• Extra-high resolution 16384 FFT
• High-resolution image export and no ads, forever

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |



## Version history (last 5 releases)

### 1.1.2 — 2026-08-19

Improved the first-launch permission flow and analyzer stability.

### 1.1.1 — 2026-08-05

Minor improvements and stability fixes.

### 1.1.0 — 2026-07-26

NEW - Spectrum Pro tools:
- 1/3 octave RTA view with per-band peak hold
- Tone generator: sine, 20 Hz-20 kHz sweep, white & pink noise
- Peak list with harmonic tags
- Up to 4 tap markers on the chart
- Calibration offset and 16384 FFT
Tap cursor markers for everyone, plus stability fixes.

### 1.0.1 — 2026-07-22

Minor improvements and stability fixes.

### 1.0 — 2026-07-16

No release notes.

## Apps similar to Spectrum

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Audio Spectrum Pro: Analyzer](https://appshunter.io/ios/app/audio-spectrum-pro-analyzer/id6780856025) | — | Free | Music |
| [Voice Tuner: Pitch Tracker](https://appshunter.io/ios/app/voice-tuner-pitch-tracker/id6782551637) | — | Free | Music |
| [Spek Spectrogram analyzer](https://appshunter.io/ios/app/spek-spectrogram-analyzer/id6778501151) | 5.0 (1) | Free | Music |
| [Harmonics Practice](https://appshunter.io/ios/app/harmonics-practice/id6748588377) | — | Free | Music |
| [Harmonic Tuner](https://appshunter.io/ios/app/harmonic-tuner/id6759459522) | 5.0 (1) | Free | Music |
| [Beat Kitchen Harmonic Synth](https://appshunter.io/ios/app/beat-kitchen-harmonic-synth/id6780983442) | 4.8 (11) | Free | Music |

## More apps by SEONYONG LEE

- [Daily Bible: Verse & Prayer](https://appshunter.io/ios/app/daily-bible-verse-and-prayer/id6775892937)
- [Pilmori - Film Camera](https://appshunter.io/ios/app/pilmori-film-camera/id6776468544)
- [Intonaire](https://appshunter.io/ios/app/intonaire/id6779674961)
- [Lumen · Daily Bible](https://appshunter.io/ios/app/lumen-daily-bible/id6780531841)
- [연애도감 - AI 채팅](https://appshunter.io/ios/app/ai/id6780905411)
- [ClickTimer - Ticketing Timer](https://appshunter.io/ios/app/clicktimer-ticketing-timer/id6782375382)

All apps by SEONYONG LEE: https://appshunter.io/developer/6775892940

## Related topics

[ieee spectrum](https://appshunter.io/ios/topics/ieee-spectrum)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*