Comparison

SpectrumView Plus vs Complete Vocal Technique

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SpectrumView Plus

Visualize audible and inaudible frequencies in real-time with a dynamic audio companion. Analyze sound with detailed spectrograms, spectrum analyzers, and recording capabilities. Ideal for musicians, engineers, and anyone interested in sound analysis.

Highlights
  • Real-time spectrogram and spectrum analyzer
  • Configurable sample rate and frequency resolution
  • Record, pause, and playback audio files
  • Frequency pinch-to-zoom and tap data cursor
  • Logarithmic and linear scale options
  • Web file transfer for easy access
Features
Read full description

SPECTRUMVIEW PLUS Visualise, in real time, the frequencies that you can hear around you and even those you cannot with SpectrumView Plus, 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. · 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. · Logarithmic scale. Allows you to set either linear or logarithmic frequency scales in the Spectrogram and Spectrum Analyser views. · Peak hold. Allows you to freeze and hold the peaks of the frequency envelope (three holds in three distinct colours) in Spectrum Analyser mode. · 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. · 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. · *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.

About

Complete Vocal Technique

Unlock your vocal potential with a comprehensive singing technique guide. Learn to reach higher, lower, longer, and faster notes healthily with practical tools, visuals, and sound examples. This app offers in-depth explanations of vocal anatomy and science for singers of all levels.

Highlights
  • Vocal technique explanations
  • Pedagogical illustrations and graphs
  • Extensive sound examples
  • Singing exercises
  • In-depth anatomy and physiology
  • Vocal mode control
  • Vocal effect training
Features
Read full description

The app contains the book in the following languages: English, Italian, and Chinese. Singing is not difficult - Everybody can learn how to sing! Unlock the sounds you want in your own voice with simple tools, visuals, sound examples and training tips. The Complete Vocal Technique app helps you reach higher, lower, longer, and faster notes in all volumes, pitches, and sound colours, with any vocal effect in a healthy manner. Complete Vocal Technique (CVT) is the world’s biggest singing technique and it has helped professional singers from all over the world for more than 25 years. CVT covers the latest and most innovative research in anatomy, physiology and voice science to secure that any singer can perform any desired sound in a healthy manner. With the Complete Vocal Technique app you get your own personal copy of the entire CVT system available at your fingertips. The app combines easily understandable explanations of vocal technique with pedagogical illustrations, graphs, and research to give quick, practical, and applicable solutions to any issue of the voice. All technical, theoretical and pedagogical explanations are supported by an extensive library of sound examples and singing exercises consisting of real life audio examples sung by professional singers. With the Complete Vocal Technique app you have access to all of this in the palm of your hand - in one app - that you can use wherever and whenever you need it.  The CVT app represents ground breaking approaches within vocal pedagogy, and helps professional as well as amateur singers reach new potential and solve problems in their voices. The app covers techniques for all styles of music, how to control the four vocal modes, speech techniques, mastering the various vocal effects - training all sounds in a healthy way. The app lets you unlock the sounds YOU want in your own voice with simple tools, visuals, and training tips, as well as offering in-depth descriptions of anatomy, physiology, and science. Complete Vocal Technique has been used in recording studios, on tours, and in concerts all over the world, and has quickly become an invaluable resource for countless of singers in their work with their voices. Complete Vocal Technique is developed by Cathrine Sadolin and she is continuously researching with ENT doctors, acoustical engineers, and other voice professionals from all over the world.

Screenshots

SpectrumView Plus4 screens
Complete Vocal Technique4 screens

Verdict

The call

The clearest difference is price: SpectrumView Plus at $7.99 against Complete Vocal Technique's $64.99. SpectrumView Plus also leads on iOS requirement (9.0 vs 13.0). Complete Vocal Technique's advantage is rating (4.8 vs 3.7) and review sentiment (83% vs 63%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

SpectrumView Plus costs $7.99 and Complete Vocal Technique $64.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Complete Vocal Technique holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 15 and 8 respectively. Written reviews point the same way: 63% of SpectrumView Plus's written reviews are positive against 83% of Complete Vocal Technique's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 6 level
SpectrumView Plus versus Complete Vocal Technique: the parameters behind the verdict, then further details
ParameterSpectrumView PlusComplete Vocal Technique
Price$7.99 — better$64.99
Rating3.7 (15 ratings)4.8 (8 ratings) — better
Positive reviews62.8% of reviews83.3% of reviews — better
Number of ratings15 — better8
Update frequencyEvery 5 monthsEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size15 MB514 MB
Age rating4+12+
DeveloperOxford Wave Research Ltd.Complete Vocal Institute

Customer experience

SpectrumView Plus

All ratings15 ratings
Positive60.0%
Neutral6.7%
Negative33.3%
Written reviews43 reviews
Positive62.8%
Neutral11.6%
Negative25.6%

Complete Vocal Technique

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive83.3%
Neutral16.7%
Negative0.0%

In-app purchases

None

SpectrumView Plus

No in-app purchases

None

Complete Vocal Technique

No in-app purchases

Questions

Is SpectrumView Plus free?
SpectrumView Plus costs $7.99, with no in-app purchases.
Is Complete Vocal Technique free?
Complete Vocal Technique costs $64.99, with no in-app purchases.
Which has better reviews, SpectrumView Plus or Complete Vocal Technique?
Complete Vocal Technique is rated higher. SpectrumView Plus averages 3.7 out of 5 from 15 ratings, while Complete Vocal Technique averages 4.8 from 8 ratings.
Do SpectrumView Plus or Complete Vocal Technique have ads?
Neither SpectrumView Plus nor Complete Vocal Technique shows ads.
Which is updated more often, SpectrumView Plus or Complete Vocal Technique?
SpectrumView Plus ships an update every 5 months, and Complete Vocal Technique every 5 months. Most recently, SpectrumView Plus was updated on September 21, 2026 and Complete Vocal Technique on September 18, 2026.

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