Comparison

Sonofield Ear Trainer vs Interval Matrix Pro

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

Head to head
About

Sonofield Ear Trainer

This app helps musicians develop their ear by focusing on the feeling of individual notes within a key, rather than traditional interval training. It uses sustained drones and offers various modes like identifying scale degrees, melodies, and singing exercises. The app adapts to your skill level with an intuitive interface and progression path.

Highlights
  • Feeling-based note recognition
  • Scale degree identification
  • Melody recognition training
  • Singing exercises
  • Hands-free training mode
  • Interactive exploration instrument
Features
Read full description

Sonofield Ear Trainer (SET) is a revolutionary ear training app designed to help you intuitively play the melodies you hear and imagine. Instead of relying on traditional old methods like intervals, SET focuses on helping you feel the unique character of each note within a key. By using sustained drones to create a tonal foundation, you’ll learn to recognize scale degrees based on their *feeling*, not just how they sound. The app offers a variety of ways to train: * Degrees Mode - Identify individual notes against the drone by feeling. The heart of SET. * Melody Mode - Identify short melodic phrases, preparing you for real music. * Voice Mode - Sing the requested scale degree into your microphone. * Pocket Mode - Hands-free training for when you're on the go. * Free Play - An interactive instrument for exploration. With its intuitive, color-coded interface, thoughtfully designed progression path, and multiple difficulty levels, SET adapts to your skill level while keeping practice engaging. Whether you're a beginner or an experienced musician, SET is your guide to unlocking true musical fluency through intuitive, feeling-based ear training. No ads or forced payments. The free version contains full foundations for feeling-based ear training. Download the ear training app now!

About

Interval Matrix Pro

Visualize music theory concepts like scales, chords, and intervals across various instruments. This app uses a unique color-coding system to make complex musical relationships intuitive and easy to understand, moving beyond rote memorization.

Highlights
  • Visual music theory for guitar, piano, bass, and more
  • Color-based system for intuitive understanding
  • See scales, chords, modes, and intervals
  • Supports custom tunings and instruments
  • Extensive scale and mode library
  • Designed by a music educator
Read full description

Interval Matrix Pro - Visual Music Theory for Guitar, Piano, Bass & More Stop memorizing shapes. Start seeing music. Interval Matrix Pro is a powerful visual music theory app for guitar, piano, bass, and multi-instrument musicians. Instantly see scales, chords, modes, and intervals across instruments using a unique color-based system that makes music theory intuitive, fast, and musical. Instead of dense theory books or memorized box patterns, Interval Matrix Pro uses a high-contrast 12-color interval matrix that reveals the geometry of music in real time. Your eyes navigate. Your ears create. Why Interval Matrix Pro Is Different Most music theory apps show notes. Interval Matrix Pro shows relationships. Inspired by advanced mental compartmentalization techniques used by legendary players, Interval Matrix Pro functions like a GPS for music theory and helps you: Instantly recognize interval function Visually understand tension and resolution Translate ideas between guitar, bass, piano, and other instruments Understand harmony without memorizing patterns This is music theory training, not rote memorization. Supported Instruments Guitar and Bass Guitar: 6-string, 7-string, and 8-string layouts Bass: 4-string, 5-string, and 6-string visualization Instantly translate shapes between guitar and bass Piano and Keyboard Full 88-key visualizer Clearly understand black-key and white-key relationships Ideal for composition, harmony, and ear training Orchestral and Folk Instruments Violin, Viola, Cello, Double Bass Banjo, Mandolin, Dulcimer, Ukulele World Instruments (Deep Vault) Sitar, Oud, Bouzouki, Balalaika, Charango Explore global harmony systems visually Total Customization (Advanced Mode) Build the instrument you actually play. Custom instruments and fretboards Custom tunings including Drop D, Open G, DADGAD, and more Interval toggling to isolate function Practice shell voicings Highlight only root, 3rd, and 7th Remove noise and focus on intent A Deep Theory Engine Over 146 scales including exotic, symmetrical, and authentic Indian ragas Accurate modal labeling including Dorian, Phrygian, Aeolian, Mixolydian, and more Smart color coding that helps you feel stability and tension before you play Built by a Music Educator Interval Matrix Pro was designed by a 30-year music educator and former guitar tech and student of Shawn Lane. The app is paired with a complete interval-based learning curriculum. Learn more at: https://www.bestguitarchannel.com/shawnlane Stop guessing. See the music. Enter the Matrix. Start your 3-Day Free Trial today. https://bestguitarchannel.com

Screenshots

Sonofield Ear Trainer4 screens
Interval Matrix Pro4 screens

Verdict

The call

The clearest difference is ratings volume: Sonofield Ear Trainer at 376 against Interval Matrix Pro's 2. Sonofield Ear Trainer also leads on iOS requirement (13.0 vs 15.1). Interval Matrix Pro's advantage is review sentiment (100% vs 89%). On price, rating, update cadence and ads 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. Sonofield Ear Trainer sells 4 one-off in-app purchases and Interval Matrix Pro sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Sonofield Ear Trainer against 5.0 for Interval Matrix Pro. That said, the two scores are not equally well evidenced: Sonofield Ear Trainer has 376 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 89% of Sonofield Ear Trainer's written reviews are positive against 100% of Interval Matrix Pro's.

UpkeepUpdate frequency

Sonofield Ear Trainer ships an update every 9 days, Interval Matrix Pro weekly. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Sonofield Ear Trainer versus Interval Matrix Pro: the parameters behind the verdict, then further details
ParameterSonofield Ear TrainerInterval Matrix Pro
PriceFreeFree
Rating4.9 (376 ratings)5.0 (2 ratings) — better
Positive reviews88.7% of reviews100.0% of reviews — better
Number of ratings376 — better2
Update frequencyEvery 9 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size105 MB44 MB
Age rating4+9+
DeveloperSonofield Ear Trainer Education Ltd.JIMMY MICHAEL HUDSON

Customer experience

Sonofield Ear Trainer

All ratings376 ratings
Positive97.3%
Neutral1.6%
Negative1.1%
Written reviews151 reviews
Positive88.7%
Neutral6.6%
Negative4.6%

Interval Matrix Pro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Sonofield Ear Trainer

Reported bugs

1 issue
  • None reported

Requested features

5 requests
  • Option to switch between 12TET and just intonation
  • Ability to reduce octave range
  • Incorporate more timbre options for drone and notes
  • Tracking and visualization of progress and learned skills
  • Add interactive tutorial for level 1

Interval Matrix Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Sonofield Ear Trainer

One-time4
  • Lifetime Pro$14.99
  • Lifetime Pro$17.99
  • Lifetime Pro2 variants$19.99
Show 1 more
  • Lifetime Pro$24.99
4 purchases

Interval Matrix Pro

Subscriptions3
  • Weekly3 Days trial$2.997 Days
  • Monthly Subscription3 Days trial$10.991 Month
  • Yearly Subscription3 Days trial$49.991 Year
One-time1
  • Lifetime$69.99

Questions

Is Sonofield Ear Trainer free?
Sonofield Ear Trainer is free to download, with in-app purchases available.
Is Interval Matrix Pro free?
Interval Matrix Pro is free to download, with in-app purchases available.
Which has better reviews, Sonofield Ear Trainer or Interval Matrix Pro?
Interval Matrix Pro is rated higher. Sonofield Ear Trainer averages 4.9 out of 5 from 376 ratings, while Interval Matrix Pro averages 5.0 from 2 ratings.
Do Sonofield Ear Trainer or Interval Matrix Pro have ads?
Neither Sonofield Ear Trainer nor Interval Matrix Pro shows ads.
Which is updated more often, Sonofield Ear Trainer or Interval Matrix Pro?
Sonofield Ear Trainer ships an update every 9 days, and Interval Matrix Pro weekly. Most recently, Sonofield Ear Trainer was updated on October 2, 2026 and Interval Matrix Pro on October 1, 2026.

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