Learn music theory with Sonid

Learn music theory with Sonid

Music theory for everyone!

212 ratings
17 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • January 2, 2020
  • July 24, 2026

Features

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About

Learn music theory with a structured, subject-focused approach. Master notes, intervals, chords, and scales through interactive lessons, quizzes, and exercises. Expand your musical knowledge and refine your skills.

Learn individual musical subjects
Answer questions about learned topics
Exercise notes, intervals, chords, scales
Unlock new learning modules
Earn experience points and badges
Lookup musical term information
Display notes in playground
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What's New in Learn music theory with Sonid

5.0.6

July 24, 2026

- Minor improvements in question generation - Improvement progress sync - Small UX improvements

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Subscription plans

Sonid Plus

Learn music theory without ads!

$2.991 Month
How to cancel Learn music theory with Sonid subscription ⁉️
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In-App Purchases

$9.99

Guitar Extension

Practice music theory on the guitar!

User reviews

Please Fix This

The triad section is broken and unpassable. The exercise asks you to build a full triad, but the app won't let you register three notes (section two) — so a correctly placed chord gets marked wrong every time. Entering the notes one at a time doesn't help either; it still counts a right answer as wrong. There is no way to complete the section, which means there's no way to progress in the app at all. This isn't difficulty, it's a straight-up bug that makes the core lessons unusable. I liked the one-concept-at-a-time approach up to this point, so fix the triad input and I'll gladly raise the rating. As it stands I can't recommend paying for something you can't actually finish.
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Response from developer

Hi, thanks for sharing your bug report. I have actually worked really hard past month to completely revise the app to native swift ui. And made major improvements to question answering and grading. I am sure it will fix this bug and work towards a release next week. I hope it helps you, otherwise please let me know through info@sonid.app

Great, one problem tho

On the web version the guitar isn’t loading but I do recommend

Can’t hear the sound

Even the sound setting is on

Really good! Although, one minor annoyance

This app is amazing for training you on music theory concepts. it’s very engaging and the content sticks pretty well! My one annoyance is the app can get pretty laggy and sometimes you’ll press a button several times thinking it didn’t register and then they’ll all happen at once after causing you to input the incorrect answer on accident. i think you shouldn’t be able to press submit if you haven’t answered the question yet.
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it’s getting there..

so far the content has been ok but the audio randomly stops working halfway through a test. this will literally make me fail because i can’t hear notes without audio. my ringer is on, volume is up, do not disturb is off. please fix this or i can’t continue to use this app.

Developer apps

FAQ

What does Sonid do?

Sonid is a music education app designed to teach music theory in a fun and structured way. It focuses on one subject at a time, allowing for natural understanding and adaptation to new material. The app covers harmony and ear-training, helping users build scales, recognize chords and progressions, and understand musical terminology.

What are the key features of Sonid?

Key features include learning about specific musical subjects like notes, intervals, and scales, followed by answering related questions. Users can exercise various topics with adjustable difficulty, unlock new modules, earn experience points, and look up detailed information about musical terms. A playground feature allows displaying notes from scales, chords, or intervals.

How much does Sonid cost?

The app is free to download and use, offering in-app purchases for additional content. Subscribing to Sonid Plus unlocks more exercises, tests combining various topics, detailed error statistics, and an ad-free learning experience.

Who is Sonid for?

Sonid is suitable for both beginners and more advanced musicians who wish to expand their musical knowledge. It's ideal for anyone wanting to improve their understanding of harmony, ear-training, and musical composition, ultimately aiming to become a more refined musician.

What musical concepts can I learn with Sonid?

Sonid focuses on harmony and ear-training. You can learn to build and play any existing scale, recognize keys and progressions, read and understand chord symbols, and identify intervals, chords, scales, and progressions by ear. This knowledge helps in composing, improvising, and communicating effectively with other musicians.