# SpectrumView vs Complete Vocal Technique Intro

The clearest difference is rating: Complete Vocal Technique Intro at 4.0 against SpectrumView's 3.1. Complete Vocal Technique Intro also leads on in-app purchases (none vs 7). SpectrumView's advantage is ratings volume (74 vs 4) and iOS requirement (9.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SpectrumView sells 7 one-off in-app purchases. Complete Vocal Technique Intro asks for nothing beyond the download.

Complete Vocal Technique Intro holds the better App Store score, 4.0 against 3.1. That said, the two scores are not equally well evidenced: SpectrumView has 74 ratings behind it against 4, so its average is the more settled of the two.

SpectrumView ships an update every 10 months, Complete Vocal Technique Intro every 7 months. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SpectrumView | Complete Vocal Technique Intro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (74 ratings)](https://appshunter.io/ios/app/spectrumview/id472662922/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/complete-vocal-technique-intro/id1221380256/reviews)** |
| Number of ratings | **74** | 4 |
| Positive reviews | 62.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 78 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Oxford Wave Research Ltd.](https://appshunter.io/developer/472662925) | [Complete Vocal Institute](https://appshunter.io/developer/1123324891) |

## What reviewers say

### SpectrumView

[App page](https://appshunter.io/ios/app/spectrumview/id472662922)

This app provides real-time audio analysis with a dynamic spectrogram and spectrum analyzer. Visualize audible and inaudible frequencies, measure tones, get feedback on speech, identify sounds, and calibrate instruments. Access recordings and snapshots easily.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

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

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 💰 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)

**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

**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


### Complete Vocal Technique Intro

[App page](https://appshunter.io/ios/app/complete-vocal-technique-intro/id1221380256)

Learn a comprehensive singing technique used by professionals worldwide. This app offers practical solutions for vocal issues with clear explanations, illustrations, and sound examples. Explore vocal modes, effects, and healthy singing practices for all music styles.

**Highlights:** Comprehensive vocal technique overview, Pedagogical illustrations and graphs, Extensive library of sound examples, Singing exercises by professional singers, Techniques for all music styles, Control of four vocal modes, In-depth anatomy and physiology descriptions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SpectrumView free?

SpectrumView is free to download, with in-app purchases available.

### Is Complete Vocal Technique Intro free?

Complete Vocal Technique Intro is free to download, with no in-app purchases.

### Which has better reviews, SpectrumView or Complete Vocal Technique Intro?

Complete Vocal Technique Intro is rated higher. SpectrumView averages 3.1 out of 5 from 74 ratings, while Complete Vocal Technique Intro averages 4.0 from 4 ratings.

### Do SpectrumView or Complete Vocal Technique Intro have ads?

Neither SpectrumView nor Complete Vocal Technique Intro shows ads.

### Which is updated more often, SpectrumView or Complete Vocal Technique Intro?

SpectrumView ships an update every 10 months, and Complete Vocal Technique Intro every 7 months. Most recently, SpectrumView was updated on October 18, 2026 and Complete Vocal Technique Intro on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*