Comparison

Music Spectrograph vs Soniq Viewer

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

Head to head
About

Music Spectrograph

Visually reverse engineer sound and music in real-time with a live MIDI piano roll displaying pitch and frequency. Slow down or stop audio to analyze musical patterns, aiding in music transcription and learning.

Highlights
  • Real-time MIDI piano roll
  • Pitch and frequency visualization
  • Slow down and stop audio
  • Music transcription aid
  • Adjustable playback speed
  • Color-coded pitch graph
Features
Read full description

Music Spectrograph allows you to visually reverse engineer sound and music, in real-time. See a live MIDI piano roll showing pitch and frequency. When playing music files, you can slow down, and even stop sound in time. Music Spectrograph is being using in college music programs to aid in learning music transcription. The Hotpaw Music Spectrograph presents a high-resolution scrolling spectrogram as you listen, so that you can see these patterns in sound and music, as well as how sound corresponds to notes on a piano keyboard. This piano alignment makes it far easier to spot which frequencies in sounds correspond to which musical notes. Features include: - 12th-octave MIDI-pitch-centered spectrograph (also called a sonogram) - Usable with live audio, tunes from your iOS device's music library, or a file downloaded via a URL (web address) - Records up to a 4 minute spectrograph history you can stop, scroll back and review - Slow Down music files by up to 8X, or speed music up by 3X to skip sections faster - Stop music in time, and still hear the music frequencies present via re-synthesis (scroll back a little in time to bring up the ReSynth switch). - Play tunes in mono, left or right channel only, or with center-panned vocals reduced - Color the pitch graph to see if notes are in-tune or out-of-tune - Color the spectrograph for loudness, or graph in black-and-white or with Pastel colors - Mid-pitch filtering to remove some of the higher overtones Use the Input? button to select a tune from your library (DRM protected iTunes files not supported). Use the Gear button to select among several viewing modes. There's a volume control to manually set the sensitivity threshold. Stop playing or recording to scroll back and review or resynthesize sound. Touch the keyboard during resynthesis to isolate one note. For many musical sounds, this app will show you many overtones and harmonics, not just the fundamental pitch of notes. Some musical experience is required to tell musical notes from their overtones and harmonic frequencies.

About

Soniq Viewer

This app visualizes sound frequencies using your device's microphone. It displays the pitch of your voice and music on an equally-tempered musical scale, with adjustable input sensitivity and up to 60 frames per second.

Highlights
  • Frequency spectrum visualization
  • Microphone audio input
  • Pitch detection
  • Equally-tempered musical scale display
  • Adjustable input sensitivity
  • High frame rate display (up to 60 fps)
Features
Read full description

Soniq Viewer is a frequency spectrum visualizer. It uses a microphone to pick up audio to draw. You can easily see the pitch of your voice. ================================================== * To play and visualize the music in iPod Library, use "Soniq Player". * Requires a microphone(built-in mic or earphones with mic). ================================================== Features - Spectrum is displayed relative to an equally-tempered musical frequency scale. - Supports input sensitivity setting. - Spectrum is displayed up to 60 frames per seconds.

Screenshots

Music Spectrograph2 screens
Soniq Viewer2 screens

Verdict

The call

The clearest difference is review sentiment: Soniq Viewer at 100% against Music Spectrograph's 50%. Soniq Viewer also leads on rating (5.0 vs 2.5) and price ($1.99 vs $9.99). Music Spectrograph's advantage is update cadence (every 6 weeks vs every 20 months) and ratings volume (4 vs 1). On ads, in-app purchases, monetization model 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

Music Spectrograph costs $9.99 and Soniq Viewer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Soniq Viewer holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 50% of Music Spectrograph's written reviews are positive against 100% of Soniq Viewer's.

UpkeepUpdate frequency

Music Spectrograph ships an update every 6 weeks, Soniq Viewer every 20 months. Both last shipped on November 1, 2026.

Scorecard6 real differences · 4 level
Music Spectrograph versus Soniq Viewer: the parameters behind the verdict, then further details
ParameterMusic SpectrographSoniq Viewer
Price$9.99$1.99 — better
Rating2.5 (4 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings4 — better1
Update frequencyEvery 6 weeks — betterEvery 20 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.4 — better15.6
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperHotPaw ProductionsYuji Koike

Customer experience

Music Spectrograph

All ratings4 ratings
Positive25.0%
Neutral25.0%
Negative50.0%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

Soniq Viewer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Music Spectrograph

No in-app purchases

None

Soniq Viewer

No in-app purchases

Questions

Is Music Spectrograph free?
Music Spectrograph costs $9.99, with no in-app purchases.
Is Soniq Viewer free?
Soniq Viewer costs $1.99, with no in-app purchases.
Which has better reviews, Music Spectrograph or Soniq Viewer?
Soniq Viewer is rated higher. Music Spectrograph averages 2.5 out of 5 from 4 ratings, while Soniq Viewer averages 5.0 from 1 ratings.
Do Music Spectrograph or Soniq Viewer have ads?
Neither Music Spectrograph nor Soniq Viewer shows ads.
Which is updated more often, Music Spectrograph or Soniq Viewer?
Music Spectrograph ships an update every 6 weeks, and Soniq Viewer every 20 months. Most recently, Music Spectrograph was updated on November 1, 2026 and Soniq Viewer on November 1, 2026.

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