Comparison

SPARKvue 4 vs SpectrumView

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

Head to head
About

SPARKvue 4

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
Read full description

SPARKvue is a popular data collection, visualization and analysis application for STEM learning. SPARKvue enables wireless data collection and live data sharing with anyone in the world to unleash the learning experience. Capture data from the world around you: ● Graph live sensor data from the world around you in real time—pH, temperature, force, carbon dioxide and much more! ● Connect PASCO’s new wireless Bluetooth Smart sensors directly to your iPad or iPhone—just turn on the sensor and connect right in the app. Nothing could be easier! ● Connect any of 80+ PASCO sensors via our Bluetooth interfaces ● Capture images with the integrated cameras and use SPARKvue’s image analysis capabilities ● Collect and display live data using the onboard accelerometer and sound sensors Key features: ● Measure and display sensor data in real time ● Display data in a graph, bar graph, analog meter, digits or table ● Build custom displays--mix display types, images, videos, text and assessments (Build feature not available on iPhones due to screen size) ● Analyze data with built-in statistical tools (min, max, mean, standard deviation, count and area) ● Select from 8 different curve fits including linear and quadratic ● Pinch and zoom manipulation of graphs ● Capture and annotate images ● Add videos, photos and GIFs ● Includes 14 preloaded SPARKlab interactive lab activities, plus over 80 more available free online ● Create and export electronic student lab journals ● Integrated with cloud-based file sharing services such as Dropbox and more ● Add assessments including multiple choice, drop down lists, and free text response (not available on iPhones) ● Live data sharing and session sharing across devices--with each student capturing the shared data on their own device for further analysis. Share with the class or even across geographies-in real time. Designed for science learning: ● Convenient annotation, snapshot and electronic journaling are among the features supporting peer dialogue, classroom presentations, and assessment. ● With SPARKlab interactive lab activities, teachers can blend instructional content, live data collection & analysis, reflection prompts and more, all completely within the SPARKvue environment. Use PASCO free SPARKlabs or build your own! Common user experience across platforms: SPARKvue is a member of PASCO’s SPARKscience family, providing the same user experience across all technology environments: ● tablets ● phones ● computers ● interactive whiteboards No matter what the mix of technology is in the classroom or the school, teachers and students all share the same user experience--placing the learning experience in the forefront and simplifying classroom management. Where do I get sensors? PASCO offers over 80 sensors to measure almost anything in the world around you in life, earth and physical sciences plus out in the field exploring the environment. See our newest wireless sensors to measure Temperature, pH, Pressure and Force/Acceleration—all with no need for an expensive interface or wires. Just turn them on and collect data! For purchasing information, see http://pasco.com/sparkvue Languages: SPARKvue supports 28 languages. See http://pasco.com/sparkvue for details. Support: SPARKvue has an integrated help system, just a touch away with the help icon. Further assistance with SPARKvue or any PASCO product is available free from PASCO Teacher Support. About PASCO Scientific: PASCO Scientific brings a rich history of innovation and support for science education, with over 50 years of service to educators around the world.

About

SpectrumView

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
Read full description

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.

Screenshots

SPARKvue 44 screens
SpectrumView4 screens

Verdict

The call

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.

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

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
SPARKvue 4 versus SpectrumView: the parameters behind the verdict, then further details
ParameterSPARKvue 4SpectrumView
PriceFreeFree
Rating1.9 (638 ratings)3.1 (74 ratings) — better
Positive reviews46.0% of reviews63.0% of reviews — better
Number of ratings638 — better74
Update frequencyEvery 2 months — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.09.0 — better
Further details — not scored
Size91 MB17 MB
Age rating4+4+
DeveloperPASCO scientificOxford Wave Research Ltd.

Customer experience

SPARKvue 4

All ratings638 ratings
Positive21.6%
Neutral2.0%
Negative76.3%
Written reviews298 reviews
Positive46.0%
Neutral3.0%
Negative51.0%

SpectrumView

All ratings74 ratings
Positive50.0%
Neutral8.1%
Negative41.9%
Written reviews162 reviews
Positive63.0%
Neutral9.9%
Negative27.2%

User reviews

SPARKvue 4

From 638 App Store ratings

What we love

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

Room to improve

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

SpectrumView

From 74 App Store ratings

What we love

  • 👍 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

Room to improve

  • 💰 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)

Bugs and requests

SPARKvue 4

Reported bugs

5 issues
  • 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

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

SpectrumView

Reported bugs

11 issues
  • 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
Show 6 more
  • 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

Requested features

13 requests
  • 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
Show 8 more
  • 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)

In-app purchases

None

SPARKvue 4

No in-app purchases

7 purchases

SpectrumView

One-time7
  • Enable peak hold$0.99
  • Access iTunes and SoundCould$0.99
  • Generate data snapshot$0.99
Show 4 more
  • Enable Log Scale$1.99
  • Disable recording length limit$1.99
  • Enable pinch to zoom$1.99
  • Enable Web File Transfer$1.99

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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