# spectrum eye RTA — Audio frequency analyzer

> Real-time audio frequency spectrum analyzer for professionals and students. (iPhone/iPad app by Naumenko Oleg.)

- Source: https://appshunter.io/ios/app/spectrum-eye-rta/id794366989 (this page in markdown: same URL + `.md`)
- Developer: [Naumenko Oleg](https://appshunter.io/developer/576715087)
- Category: Music, Reference
- Price: $9.99 (on sale, was $11.99)
- Rating: 4.90/5 from 7 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 26 MB
- Languages: American English, Ukrainian
- Released: 2018-06-01
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/spectrum-eye-rta/id794366989/reviews.md

## What is spectrum eye RTA?

For music professionals, audio engineers, sound technicians, sound system installers and audio students. 

Equally great both for quick reference and for long - term live spectra display. Supports multiple FFT sizes, adjustable averaging time and bandwidth, selectable mic input, selectable plot color.

Main features:
- vide range of frequency resolutions & averaging times
- scalable & movable plot that animates smoothly
- uses the whole audio range even on built-in mic
- selectable input source/mic or external device


With Spectrum-Eye, You can:

- monitor sound quality on concerts,
- ring out feedback in stage monitors,
- find resonances in acoustic environments,
- evaluate spectral properties of audio material in studio,
- develop Your hearing skills (frequency - aware hearing practice),
- detect problematic frequencies in speech/music,
- tune up car sound systems

Supports external microphones & audio interfaces compatible with Your iPad or iPhone. Currently uses sum of input channels 1 & 2.

Allows selecting preferred iPad mic when no external audio input is connected. You will discover how many mics and mic directivity configurations Your device has.

Uses iOS "Audio measurement mode" to bypass built-in mic processing. This setting too can be switched on/off for comparison.

Nominal sampling rate, Hz: 48000
Measurement frequency range, Hz: 8...22000
Measurement magnitude range, dB: 144dB
Magnitude precision, dB: ± 0.2
Frequency resolution (bandwidth):
- 1 octave
- 1/3
- 1/6
- 1/12
- 1/24
- 1/48
- 1/96 (iPad only)

App also employs pink noise generator for cases where You will use it with external audio interfaces. You can use the app as a pink noice generator even when screen is off.

Basic usage tips:

Re-position plot by sliding on scales (frequency scale for moving horizontally, dB scale for moving vertically). Scale the plot horizontally or vertically using two finger pinch. 

Slide Your finger over the plot to move the cursor and see it's position in Hz and dB.

You can also find some tweaks and fine - tunings in Settings, accessible using three-dot button on top left.

The app is in active development, Your suggestions welcome!

## Key features

- Real-time spectrum display
- Adjustable FFT sizes and averaging
- Selectable microphone input
- Scalable and movable plot
- Pink noise generator
- Supports external microphones

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/spectrum-eye-rta/id794366989/reviews.md

### 5/5 — 希望更新一下

*2026-03-22*

希望更新一下

### 5/5 — Excellent app, one feature request

*2019-02-08*

Great frame rate, pretty low latency, performs very well. However, I wish the resolution could get as fine as 1/100 or if I could type in an exact frequency to monitor instead of touching the frequency closest to the one I want, not getting the exact one I want because of the course resolution.

**Developer response:** Thank You for a valuable feedback. Regarding max resolution: on iPad it’s 1/96 which is almost what You want. Unfortunately, higher resolutions are not practical as it will double the latency, require more computation.

### 5/5 — Schnell und unkompliziert

*2018-12-30, version 1.3.3*

Habe damit Lautsprecher über DSP linearisiert. Ging schnell mit super Ergebnis, was mir auch von Kollegen bestätigt wurde. 
Super App!

### 5/5 — Favorite Spectrum so far

*2018-09-25*

Very fast, light and easy to use! My favorite for now and ever!

**Developer response:** Thank You for Your positive review!

### 5/5 — Perfect

*2018-09-03, version 1.2*

The only tool that really meassures corect, because of bypassing the internal signal processing.
Very handy, easy to understand.
Thanks for that marvelous pice of software.

### 5/5 — Great calibration app

*2018-08-25*

This app allows you to send pink noise through the headphone jack and read the generated output with the integrated mic on the phone.

Very well designed and has many options and features. The only thing I would say it is lacking is an overall decibel meter to check loudness, but even if that never becomes a feature this is a great app and does what it is designed to do very well.

**Developer response:** Thank You for Your kind review! We will keep working on the app so stay tuned, and thank You for a good suggestion.

### 5/5 — Great App!

*2018-07-24, version 1.2*

Very good resolution, works flawless and it does calibrate the internal iPhone-Mic down to the subs.

## Frequently asked questions about spectrum eye RTA

### What is spectrum eye RTA used for?

Spectrum Eye RTA is used for monitoring sound quality at live events, identifying feedback in stage monitors, analyzing acoustic resonances, and evaluating spectral properties of audio material in studios. It helps users detect problematic frequencies in music and speech.

### Does spectrum eye RTA work on iPhone and iPad?

Yes, spectrum eye RTA is supported on iPhone, iPad, and iPod. It utilizes the device's microphone and can also work with external microphones and audio interfaces compatible with iOS devices.

### What is the price of spectrum eye RTA?

Spectrum Eye RTA is a paid application, priced at $9.99. This one-time purchase grants access to all its features.

### How often is spectrum eye RTA updated?

Spectrum Eye RTA was last updated on November 8, 2018, with version 1.3.3. The developer mentions the app is in active development and welcomes suggestions.

### What frequency resolution options does spectrum eye RTA offer?

Spectrum Eye RTA provides a wide range of frequency resolutions, including 1 octave, 1/3, 1/6, 1/12, 1/24, 1/48, and 1/96 (iPad only). This allows for detailed analysis across different bandwidths.

### Can spectrum eye RTA be used offline?

The description does not explicitly state offline functionality, but its core purpose of real-time audio analysis suggests it requires an active audio input. The pink noise generator can be used even when the screen is off.

### What is the magnitude precision of spectrum eye RTA?

Spectrum Eye RTA boasts a magnitude precision of ±0.2 dB, allowing for highly accurate measurements of sound levels within its measurement magnitude range of 144dB.

### Does spectrum eye RTA have ads?

No, spectrum eye RTA does not contain advertisements. It is a paid application with no in-app purchases or ads.

## Version history (last 5 releases)

### 1.3.3 — 2018-11-08

- frequency range popup has all frequency labels
- better display of parameters in Settings -> Input source
- sample rate checks for more stable operation
- ready for new 11" & 12.9" iPads!
- more distinct scale labels

### 1.3.2 — 2018-10-25

- maintenance app update, bug fixing & battery usage optimization

### 1.3.1 — 2018-10-19

Fixed localization and appearance issues. Better layout on iPad.
Ready for iPhone X, XS, XR, XS Max.

### 1.3 — 2018-09-05

About this small maintenance update:
- iOS 12 ready!
- As per Your suggestions, added plot color selection in settings. 
- Parameter popups don't disappear immediately as You select a value. Tap as many times as You want.
- Fixed rare issues with animation freezing on iOS 11.4/12.0.
- Fixed a bug with sample rate mismatch after using other audio apps with low sample rate.
- Minor but notable CPU usage optimization due to better averaging algorithm.
- This is the last version supporting iOS 9.3. Next release will use iOS 10.0 as minimum. 
- Enjoy!

### 1.2 — 2018-05-22

- fixed layout issue on iPhone in portrait orientation.
- minor user interface & performance improvements.
- addressed an issue when with open Settings app would continue recording even when not on screen
- fixed rare crash on older devices (iPhone 5) when app is not on screen

## Apps similar to spectrum eye RTA

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Audio Spectrum Analyzer dB RTA](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790) | 4.5 (3,042) | Free | Music |
| [Sound Decibel Meter-NIOSH,OSHA](https://appshunter.io/ios/app/sound-decibel-meter-nioshosha/id1571075296) | 4.5 (335) | Free | Music |
| [Audio Spectrum Analyzer Pro](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806) | 4.4 (238) | Free | Music |
| [Spectrum Analyzer: Spectrogram](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895) | 4.2 (195) | Free | Music |
| [Audio / Spectrum Analyzer](https://appshunter.io/ios/app/audio-spectrum-analyzer/id1508848574) | 4.6 (1,000) | Free | Music |
| [Decibel meter for personal use](https://appshunter.io/ios/app/decibel-meter-for-personal-use/id6448749318) | 4.5 (28) | Free | Music |

## Related topics

[naumenko oleg](https://appshunter.io/ios/topics/naumenko-oleg)

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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 2026-08-26.*