# SpectrumView

> Real-time audio spectrogram and spectrum analyzer for acoustic analysis. (iPhone/iPad app by Oxford Wave Research Ltd..)

- Source: https://appshunter.io/ios/app/spectrumview/id472662922 (this page in markdown: same URL + `.md`)
- Developer: [Oxford Wave Research Ltd.](https://appshunter.io/developer/472662925)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 3.10/5 from 74 App Store ratings · 162 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 17 MB
- Languages: American English
- Released: 2011-10-18
- Data updated: 2026-08-21
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/spectrumview/id472662922/reviews.md

## What is SpectrumView?

SPECTRUMVIEW

Visualise, in real time, the frequencies that you can hear around you and even those you cannot with SpectrumView, your dynamic audio companion for iPhone, iPad, and iPod Touch.

SpectrumView provides a high-quality, real-time spectrogram and spectrum analyser display, with a configurable sample rate and frequency resolution. You can use this application to measure the highest tones you can sing, obtain visual feedback of the frequencies in your speech, identify an annoying sound, calibrate musical instruments and all sorts of acoustic analysis. 

Here's what it can do for you:

·  Refresh Spectrogram. Allows users to refresh the spectrogram so that it clears the spectrogram that had already been displayed.
·  Change min and max scale. Allows users to set their own minimum and maximum scale value on the spectrogram and spectrum analyser view, in both linear and log scale.
·  Set Recording filename. Recording filenames are editable and the suffix can be set to have an incremental value or date/time.
·  Generate snapshot of the spectrum data from playback and live recordings. [IAP]
·  Access recordings and snapshots using the "Files" app. All the data can be easily accessible using the "Files" app that is available from iOS 11. 
·  Web File Transfer. Allows you to access your files from another device using a web browser. [IAP]
·  Logarithmic scale. Allows you to set either linear or logarithmic frequency scales in the Spectrogram and Spectrum Analyser views. [IAP]
·  Peak hold. Allows you to freeze and hold the peaks of the frequency envelope (three holds in three distinct colours) in Spectrum Analyser mode. [IAP]
·  Save location. Never forget where a clip was recorded – uses the devices location services.
·  Auto lock disabled. During playback and recordings auto lock is disabled to prevent the device from automatically locking (if enabled), for uninterrupted recording/playback
·  Multiple selectable sample rates from 8,000 Hz to 48,000 Hz
·  High-frequency resolution with configurable signal analysis window lengths or Fast Fourier Transform (FFT) orders. 
·  Sound intensity represented using a colour spectrum scale from -96 dBFS to 0 dBFS. 
·  Frequency Pinch-to-Zoom. Allows you to zoom into the frequency space to look at a specific tone or frequency.  [IAP]
·  Recording and Playback of Audio Files. Provides a fully functional audio recorder that allows you to record, pause and play back files in high-quality, uncompressed, wave format.
·  Tap Data Cursor. Allows taps on any part of the Spectrogram or Spectrum Analyser display to obtain the exact frequency in Hertz (Hz) and level in decibels (dB) at that point.
·  Musical Notes or Frequency Display on Tap. Selectable frequency or musical pitch notation to obtain the cent-accurate musical note e.g. A4 (22), when the display is tapped.
·  Live Spectrogram and Spectrum Analyser Views of Recorded Files.  Files recorded can be played back and the Spectrogram and Spectrum Analyser modes can be used to review the audio.
·  Sharing Recorded Files by Email or iTunes File-sharing.
·  High Quality Screenshots.
· *Improved* Soundcloud support.  Audio files can be uploaded to or downloaded from Soundcloud as well as being able to post audio to Facebook. [IAP]
·  Playback from iTunes library.  Files can now be analysed directly form the iTunes library.
·  *NEW* Import audio from videos in your device library.
·  Fullscreen mode. Hide the menu at the bottom of the screen to get even more of the screen dedicated to frequency analysis.
·  Selectable spectrogram colour scales. You can now select one of 7 colour scales for your spectrogram.
·  Selectable window functions.  You can now see the window function options provided.
·  Apply gain.  A maximum of 24dB gain can be applied to make ‘hard to see’ details easier to view.
·  Open In.  Audio files can be directly opened in SpectrumView.  View files sent by email directly in SpectrumView.

## Key features

- Real-time spectrogram and spectrum analyzer
- Configurable sample rate and frequency resolution
- Record, pause, and playback audio files
- Generate snapshots of spectrum data
- Web file transfer
- Tap data cursor for precise frequency and level
- Musical notes or frequency display on tap

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Enable Log Scale | $1.99 | one-time |
| Disable recording length limit | $1.99 | one-time |
| Enable pinch to zoom | $1.99 | one-time |
| Enable peak hold | $0.99 | one-time |
| Access iTunes and SoundCould | $0.99 | one-time |
| Enable Web File Transfer | $1.99 | one-time |
| Generate data snapshot | $0.99 | one-time |


## What do users think of SpectrumView?

Overall sentiment: mixed

**Pros**

- 👍 Accurate and reliable spectrogram visualization
- 🎯 Highly configurable FFT and sampling settings
- 🎨 Beautiful and intuitive user interface
- 📊 Excellent for analyzing speech, music, and animal sounds
- ⚙️ Useful for professional audio calibration and research
- 🆓 Powerful functionality available in free version
- 📱 Works well on iPad and iPhone devices
- 🔧 Data export capabilities for external use

**Cons**

- 💰 Aggressive in-app purchase model for basic features
- 🔐 Unexplained location permission requests
- 📉 Linear frequency scale wastes screen space
- ⏱️ Slow app startup times
- 🎯 Limited frequency range (8kHz cap in recent versions)
- 🖥️ Outdated GUI not optimized for modern devices
- 📝 Unclear pricing and feature structure
- ⚠️ Frequent crashes after updates

**Commonly reported bugs**

- App crashes on startup after updates
- Crashes when attempting to zoom on spectrograms
- Crashes when playing files from iTunes library
- Microphone hijacking error messages
- Pinch-to-zoom and pan features not functioning properly
- App freezes when backgrounded
- Spectrogram resets when rotating device orientation
- Audio plays through speaker instead of headphones
- Blank screen with no display output
- Incompatibility with older iOS versions
- Requires in-app purchase prompts for all features after iCloud restore

**Most requested features**

- Logarithmic frequency scale for audio analysis
- Adjustable time scale/window for spectrograms
- Ability to analyze audio from music library/iTunes
- Longer-term averaging for spectrum analyzer
- A-weighting frequency selection
- Batch delete option for recordings
- Real-time audio input from playing songs
- Metadata storage (timestamp, location) in WAV files
- SPL meter functionality
- 3D display option
- Adjustable color range for spectrogram
- Auto-readout of highest amplitude frequency
- Higher frequency range support (above 20kHz)

## Recent user reviews (10 of 162)

All indexed reviews: https://appshunter.io/ios/app/spectrumview/id472662922/reviews.md

### 3/5 — Not adjustable?

*2026-07-26, version 2.4.2*

I couldn’t find settings for dynamic range or scrolling rate.

### 5/5 — Sehr gut

*2026-06-28*

Die App ist super! Hat mir sogar bei einer beweiserhebung geholfen wegen stalkings:-)
Ein Verbesserungsvorschlag habe ich dennoch es wäre Mega geil wenn man die Tonträger filtern könnte ✊🏽😎❤️

**Developer response:** Ihr Verbesserungsvorschlag ist ein hervorragender Punkt. Da wir die App kontinuierlich weiterentwickeln, würden wir gerne mehr über Ihren Anwendungsfall erfahren und darüber, wie genau Sie die Filterfunktion benötigen würden.


Bitte senden Sie uns eine kurze E-Mail an techsupport@oxfordwaveresearch.com. Unser Entwicklungsteam schaut sich Ihr Feedback gerne näher an, um zu sehen, wie wir die App in zukünftigen Updates für Sie noch besser machen können!


Herzliche Grüße,

### 3/5 — Librarの順番がバラバラになる

*2026-06-07*

SpectrumView Libraryのソート順がおかしい．
順番に並ばない．

基本的な機能は大変優れている

**Developer response:** Thanks for the useful feedback and the issue you are facing with the file order in the library. Could you please send an email with the details of the issue to techsupport@oxfordwaveresearch.com, so that we can properly investigate and help you better?

### 4/5 — good

*2026-03-26*

generally very good!

Using the slider bar makes it difficult to set values such as gain precisely. It would be very helpful if values could also be entered directly by typing.

**Developer response:** Thank you for the 4-star review and the helpful feedback! We’re glad to hear the app is working well for you. we have passed this request along to our development team for their consideration in future updates to the app.

### 5/5 — 非常好的app，帮我找到电流声来源，不是我幻听！

*2025-11-27*

界面清晰实用，可以去设置里调整检测频率范围

**Developer response:** Thanks for the nice review. We are happy to hear that SpectrumView helped you locate the source of an electrical noise.

### 5/5 — Cool!

*2025-10-30*

This is very good! But I got a bug, why if I import a loud audio, the music is crashing, pls fix this.

**Developer response:** Thanks for the review and feedback. Could you please send an email to techsupport@oxfordwaveresearch.com and let us know more about the loud audio issue? So that we can understand it better and help you more.

### 1/5 — web file analyzer doesn't work

*2025-02-23*

i purchased the web file analyzer but the url doesn't work.

**Developer response:** Sorry to hear that the web file transfer url does not work as expected. Can you please send an email to techsupport@oxfordwaveresearch.com and describe the issue you are facing in more detail? This way we can help you sort the issue out better.

### 5/5 — Great for education

*2024-12-19*

I used this app in a few lectures on sound for people in sound therapy training to visualise concepts such as overtones and beats, pitch etc. Really fantastic costumer support too!

**Developer response:** Happy to hear that you find Spectrumview useful. Thank you very much for the nice feedback.

### 3/5 — Limited to 8kHz?

*2024-11-22*

I distinctly remember being able to have both spectrogram and analyzer zoom up to 20kHz… that’s why I paid for it. Now it’s limited to 8kHz, and the setting no longer allows for anything higher.

**Developer response:** Thanks for your review. From what I understand, it seems that the audio sample rate in your SpectrumView settings was set at 16 kHz, thereby it shows only up until 8 kHz. If you go into the settings and change the audio sample rate to 48 kHz you will be able to view up until 24 kHz. Let me know if this helps please by sending an email to techsupport@oxfordwaveresearch.com. Thanks for using SpectrumView and kind regards.

### 5/5 — An avid user

*2024-10-21*

Very useful for recording and visualising speech. Thanks.

**Developer response:** Thanks for your feedback. We hope you continue to enjoy using SpectrumView.

## Frequently asked questions about SpectrumView

### What does SpectrumView do?

SpectrumView visualizes audio frequencies in real-time using a spectrogram and spectrum analyzer. It allows users to see audible and inaudible frequencies, measure tones, analyze speech, identify sounds, and calibrate instruments.

### What are the key features of SpectrumView?

Key features include real-time spectrogram and spectrum analyzer views, configurable sample rates and frequency resolution, audio recording and playback, snapshot generation, web file transfer, and a tap data cursor for precise measurements.

### How much does SpectrumView cost?

The app is free to download and use, but offers in-app purchases for advanced features such as generating snapshots, web file transfer, logarithmic scale, peak hold, and frequency pinch-to-zoom.

### What devices is SpectrumView compatible with?

SpectrumView is designed for iPhone, iPad, and iPod Touch devices running iOS 11 or later, allowing easy access to recordings and snapshots via the 'Files' app.

### What are common use cases for SpectrumView?

Common use cases include measuring the highest tones a person can sing, obtaining visual feedback of speech frequencies, identifying unknown or annoying sounds, calibrating musical instruments, and performing general acoustic analysis.

## Version history (last 5 releases)

### 2.4.2 — 2024-01-25

SpectrumView 2.4.2 (2.4.35) Update:

- Import audio from videos in your device library
- Improved SoundCloud compatibility 
- Improved sharing with other apps like Whatsapp
- Various bug fixes

### 2.4.1 — 2021-10-07

SpectrumView 2.4.1 (2.4.18) Update
* Fixes bug which caused audio imported from iTunes library to play at high speed

### 2.4 — 2021-10-06

SpectrumView 2.4.12 Update
* Updates for iOS 15 and new devices
* Various bug fixes

### 2.3 — 2018-07-18

This app has been updated by Apple to display the Apple Watch app icon.

New features in 2.3
* iPhone X compatible user interface
* Added Privacy Policy for the app
* Ability to refresh spectrogram during recording and playback
* Ability to set the minimum and maximum scale value of spectrogram and spectrum analyser view (in both linear and log scale)
* Ability to set recording filename - recording filename can now have incremental suffix or date/time suffix
* File names of image snapshots and data snapshots that are generated from playback are named according to the playback filename which makes it easier to identify the file. 
* Ability to access all the recordings, image snapshot and data snapshot from "Files" app (available from iOS 11)

Also,
* Updated to latest SDK and fixed user interface issues
* iOS 9.0 and above compatibility issues addressed (including file open issue)

### 2.2.1 — 2017-10-19

New features in 2.2
* Ability to use playback options (play/pause/seek) while viewing spectrogram
* Ability to share recordings to various other applications that support audio playback and/or attachments
* Ability to generate data snapshots of spectrogram and spectrum (both playback and recordings)
* Ability to enables access, playback, and download recordings as well as other files from a web browser on devices accessible on the same WiFi network
* In-App Purchases: Generate data snapshot and access web file transfer (WiFi)

Also,

* Various bug fixes (memory usage in iPad pro 12.9 inch, user interface issues, etc.)
* iOS 8.2 and above compatibility issues addressed

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## More apps by Oxford Wave Research Ltd.

- [SpectrumView Plus](https://appshunter.io/ios/app/spectrumview-plus/id571455198)
- [Watch Me Record](https://appshunter.io/ios/app/watch-me-record/id1183756936)

All apps by Oxford Wave Research Ltd.: https://appshunter.io/developer/472662925

## Related topics

[spectrumview](https://appshunter.io/ios/topics/spectrumview) · [audio spectrum viewer](https://appshunter.io/ios/topics/audio-spectrum-viewer) · [spectrumview plus](https://appshunter.io/ios/topics/spectrumview-plus) · [wavelet voice sonogram](https://appshunter.io/ios/topics/wavelet-voice-sonogram) · [fftwave](https://appshunter.io/ios/topics/fftwave) · [spectral analysis](https://appshunter.io/ios/topics/spectral-analysis) · [my spectrum tv app](https://appshunter.io/ios/topics/my-spectrum-tv-app)

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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 2026-08-21.*