# N-Signal / FFT Sound Analyzer — Audio Spectrum Analyzer

> Real-time audio spectrum analyzer for sound pressure and frequency analysis. (iPhone/iPad app by kyu il jung.)

- Source: https://appshunter.io/ios/app/n-signal-fft-sound-analyzer/id6755102833 (this page in markdown: same URL + `.md`)
- Developer: [kyu il jung](https://appshunter.io/developer/1588553024)
- Category: Utilities, Music
- Price: Free
- Age rating: 9+
- Requires: iOS 13.0 · 32 MB
- Languages: American English, Arabic, Croatian, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean and 10 more
- Released: 2025-11-20
- Data updated: 2026-07-17
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/n-signal-fft-sound-analyzer/id6755102833/reviews.md

## What is N?

N-Signal helps you visualize sound in real time.
It measures sound pressure (dBSPL) and analyzes digital frequency levels (dBFS) with precision.
Helpful for adjusting PA systems, testing stage sound, or improving room acoustics — whether in studios, churches, or classrooms.

* Key Features
- Real-time audio spectrum with FFT analysis
- dB SPL sound pressure level meter (mic input)
- Digital frequency analyzer (dBFS scale)
- Smooth graph motion optimized for live performance
- Supports dark modes
- Designed for musicians, engineers, and sound enthusiasts

N-Signal isn’t a laboratory-grade instrument, but a reliable audio reference tool for daily sound checks and education.

## Key features

- Real-time FFT audio spectrum analysis
- dB SPL sound pressure level meter
- Digital frequency analyzer (dBFS)
- Smooth graph motion
- Dark mode support

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/n-signal-fft-sound-analyzer/id6755102833/reviews.md

### 5/5 — Impressive analyzer

*2026-03-25*

If you would like to see the frequencies and amplitude of your environment or music, this free analyzer is an excellent choice.

## Frequently asked questions about N

### What is N-Signal used for?

N-Signal is used to visualize sound in real-time, measuring sound pressure (dBSPL) and analyzing digital frequency levels (dBFS). It's helpful for adjusting PA systems, testing stage sound, or improving room acoustics.

### Is N-Signal a professional-grade instrument?

No, N-Signal is described as a reliable audio reference tool for daily sound checks and education, not a laboratory-grade instrument.

### What devices does N-Signal support?

N-Signal is supported on iPhone, iPad, and iPod devices.

### What is the age rating for N-Signal?

N-Signal has an age rating of 9+.

### How often is N-Signal updated?

The latest version, 1.1.0, was released on January 8, 2026, indicating recent updates for the application.

### Does N-Signal have ads?

Yes, N-Signal contains advertisements.

### What are the key analysis features of N-Signal?

N-Signal offers real-time audio spectrum with FFT analysis, a dB SPL sound pressure level meter, and a digital frequency analyzer on a dBFS scale.

### Can N-Signal be used for live performances?

Yes, the smooth graph motion is optimized for live performance, making it suitable for musicians and engineers during shows.

## Version history (last 2 releases)

### 1.1.0 — 2026-01-08

What's New in v1.1.0

Real-time Peak Frequency Display
- See the dominant frequency at a glance with a live marker on the spectrum graph
- Smart peak tracking prevents label flickering in noisy environments
- Frequency shown with "≈" symbol to indicate approximation

Improved Low-Frequency Accuracy
- Enhanced FFT processing now measures down to 20Hz (previously 23Hz)
- More accurate energy distribution across frequency bands

Visual Refinements
- Cleaner spectrum display with uniform floor level
- Smoother curves in the low-frequency range

### 1.0.0 — 2025-11-20

No release notes.

## Apps similar to N

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sound Spectrum Analysis](https://appshunter.io/ios/app/sound-spectrum-analysis/id1434975523) | 3.6 (41) | Free | Utilities |
| [SpectralScan Audio Analyzer](https://appshunter.io/ios/app/spectralscan-audio-analyzer/id6762024331) | 5.0 (3) | Free | Utilities |
| [Spectrum Analyzer+ FFT](https://appshunter.io/ios/app/spectrum-analyzer-plus-fft/id6760830858) | 2.3 (3) | Free | Utilities |
| [Decibel Meter X](https://appshunter.io/ios/app/decibel-meter-x/id6478142605) | 4.9 (18) | Free | Utilities |
| [Frequency Counter+ Hz FFT](https://appshunter.io/ios/app/frequency-counter-plus-hz-fft/id6761234058) | 3.7 (3) | Free | Utilities |
| [Frequency Analyzer](https://appshunter.io/ios/app/frequency-analyzer/id6468837339) | 4.5 (97) | Free | Utilities |

## More apps by kyu il jung

- [오늘 음력](https://appshunter.io/ios/app/id1588553022)
- [N-Signal / Pitch Canvas](https://appshunter.io/ios/app/n-signal-pitch-canvas/id6756871451)

All apps by kyu il jung: https://appshunter.io/developer/1588553024

## Related topics

[fft analyzer](https://appshunter.io/ios/topics/fft-analyzer) · [sound analyzer free](https://appshunter.io/ios/topics/sound-analyzer-free)

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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 2026-07-17.*