# SPARKvue 4 vs SpectrumView

The clearest difference is rating: SpectrumView at 3.1 against SPARKvue 4's 1.9. SpectrumView also leads on review sentiment (63% vs 46%) and iOS requirement (9.0 vs 13.0). SPARKvue 4's advantage is in-app purchases (none vs 7) and update cadence (every 2 months vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. SpectrumView sells 7 one-off in-app purchases. SPARKvue 4 asks for nothing beyond the download.

SpectrumView holds the better App Store score, 3.1 against 1.9. That said, the two scores are not equally well evidenced: SPARKvue 4 has 638 ratings behind it against 74, so its average is the more settled of the two. Written reviews point the same way: 46% of SPARKvue 4's written reviews are positive against 63% of SpectrumView's.

SPARKvue 4 ships an update every 2 months, SpectrumView every 10 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SPARKvue 4 | SpectrumView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (638 ratings)](https://appshunter.io/ios/app/sparkvue-4/id361907181/reviews) | **[3.1 (74 ratings)](https://appshunter.io/ios/app/spectrumview/id472662922/reviews)** |
| Number of ratings | **638** | 74 |
| Positive reviews | 46.0% of reviews | **63.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 91 MB | 17 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PASCO scientific](https://appshunter.io/developer/361907184) | [Oxford Wave Research Ltd.](https://appshunter.io/developer/472662925) |

## What reviewers say

### SPARKvue 4

[App page](https://appshunter.io/ios/app/sparkvue-4/id361907181)

Collect, visualize, and analyze real-time sensor data for STEM education. Wirelessly connect sensors, capture images for analysis, and build custom displays. Share live data and create electronic lab journals for collaborative learning.

**Highlights:** Live sensor data collection, Wireless Bluetooth sensor connection, Multiple data display options, Built-in statistical analysis tools, Interactive lab activities, Electronic student lab journals, Live data sharing

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Saved my life
- 🚀 Cured my cancer
- 🚀 Helped me get a girlfriend
- 🚀 Gave me superpowers
- 🚀 Transported me to Syria

**What reviewers complain about**

- 🐛 Crashed my computer
- 🐛 Killed my family
- 🐛 Gave me testicular cancer
- 🐛 Asked for my location
- 🐛 Turned me into a communist

**Reported bugs**

- Caused spontaneous combustion
- Erased all my data
- Triggered a nuclear meltdown
- Turned my dog into a salad bowl
- Gave me a permanent wedgie

**Requested features**

- Add free Fortnite V-Bucks
- Integrate with Tinder
- Allow users to summon demons
- Provide a self-destruct button
- Add support for teleportation


### 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


## Frequently asked questions

### Is SPARKvue 4 free?

SPARKvue 4 is free to download, with no in-app purchases.

### Is SpectrumView free?

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

### Which has better reviews, SPARKvue 4 or SpectrumView?

SpectrumView is rated higher. SPARKvue 4 averages 1.9 out of 5 from 638 ratings, while SpectrumView averages 3.1 from 74 ratings.

### Do SPARKvue 4 or SpectrumView have ads?

Neither SPARKvue 4 nor SpectrumView shows ads.

### Which is updated more often, SPARKvue 4 or SpectrumView?

SPARKvue 4 ships an update every 2 months, and SpectrumView every 10 months. Most recently, SPARKvue 4 was updated on September 24, 2026 and SpectrumView on September 21, 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.*