# Learn music theory with Sonid — Music theory for everyone!

> Structured music theory education app for learning harmony and ear-training. (iPhone/iPad app by Martijn Ensing.)

- Source: https://appshunter.io/ios/app/learn-music-theory-with-sonid/id1490221762 (this page in markdown: same URL + `.md`)
- Developer: [Martijn Ensing](https://appshunter.io/developer/1490221761)
- Category: Education, Music
- Price: Free with in-app purchases
- Rating: 4.70/5 from 213 App Store ratings · 17 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 91 MB
- Languages: American English
- Released: 2020-01-02
- Data updated: 2026-09-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/learn-music-theory-with-sonid/id1490221762/reviews.md

## What is Learn music theory with Sonid?

SONID: LEARN MUSIC THEORY & EAR TRAINING

Master music theory, master your instrument.
Sonid is the most comprehensive music theory app designed to take you from a total beginner to an advanced musician. Whether you want to write better songs, improvise with confidence, read sheet music, or train your ear, Sonid provides a clear, step-by-step path to musical mastery.

Unlike other apps that overwhelm you with information, Sonid focuses on single-subject learning. This structured approach ensures you master notes, intervals, and scales before moving on to complex jazz harmony and chord substitutions.

WHY CHOOSE SONID?

Structured Curriculum: Follow an orderly map of music theory—from the musical alphabet to advanced modal harmony. A dedicated Sheet Music course teaches you to read notes, clefs, rhythm, and key signatures on the staff.

Interactive Exercises: Practice intervals, chords, scales, and notation with fun, bite-sized lessons designed for daily consistency.

Ear Training: Develop a professional ear. Recognize chord qualities, inversions, and progressions just by listening.

Real-World Application: Learn how to use theory in your playing. Understand how a Dmaj7(#11) works and where to use the Lydian mode.

Musical Playground: Visualize any scale, chord, or interval on a virtual fretboard, keyboard, or staff to see how the notes connect.

Shared Assignments: Create a custom exercise and share it with a link or QR code. Teachers, students, and friends can take the same test—and you can follow their results.

BUILD YOUR THEORETICAL KNOWLEDGE
Every musician needs a strong foundation. Sonid gives you the tools to:

Read Sheet Music: Learn treble and bass clef, note values, rests, meters, and rhythm so you can play from written music with confidence.

Scale the Heights: Master every scale, from Major and Minor to exotic modes like Mixolydian and Phrygian.

Bridge the Gaps: Learn intervals (the building blocks of music) to navigate your instrument with ease.

Master Chords: Go beyond basic triads. Learn 7th chords, extensions, and jazz voicings.

Understand Progressions: Learn why certain chords sound good together and how to create tension and release.

FEATURES AT A GLANCE:

Daily Guided Practice: Short sessions for intervals, ear training, chord construction, and sheet music.

Level Up: Unlock new modules, earn XP, and collect badges as you progress.

In-App Wiki: Instantly look up any musical term or concept without leaving your lesson.

Customizable Difficulty: Choose from Easy to Expert levels to match your current skill.

In-App Forum: Get help from a community of musicians and theory experts.

UNLOCK YOUR FULL POTENTIAL WITH SONID PLUS

Take your musicianship to the next level with advanced features:

Combined Tests: Practice multiple topics (like hard intervals and chords) in one comprehensive exam.

Advanced Statistics: Identify exactly where you are making mistakes so you can practice smarter.

Ad-Free Learning: Stay focused on your music with zero distractions.

Stop guessing and start knowing.
Whether you are a songwriter, a teacher, or a student, Sonid helps you understand how music works so you can play with more freedom and control.

Download Sonid today and start building real musicianship.

Terms of use: https://sonid.app/en/terms

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Sonid Plus | $3.99 | per month |
| Sonid Plus Quarter | $11.99 | per 3 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Guitar Extension | $9.99 | one-time |
| Remove Ads | $11.99 | one-time |
| Lifetime Plus | $69.99 | one-time |


## Recent user reviews (10 of 17)

All indexed reviews: https://appshunter.io/ios/app/learn-music-theory-with-sonid/id1490221762/reviews.md

### 4/5 — Please Fix This

*2026-07-08*

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.

**Developer response:** 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

### 4/5 — Great, one problem tho

*2025-04-05*

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

### 2/5 — Can’t hear the sound

*2024-12-04, version 2.8.0*

Even the sound setting is on

### 4/5 — Really good! Although, one minor annoyance

*2023-02-08*

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.

### 3/5 — it’s getting there..

*2022-07-28, version 2.8.0*

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.

### 5/5 — Great little app that needs more recognition

*2022-07-05*

I really like this app, it is laid out in a nice tree format and teaches you in small steps. This really needs a lot more recognition than it receives! Fantastic little app!

### 4/5 — Sound not working

*2022-06-15*

The ideas are great, it’s just the sound doesn’t play back sometimes. Sometimes I only hear one note when it’s asking for intervals, and sometimes notes just don’t play. If sound worked consistently, it’d be really good.

### 2/5 — Sound stopped working

*2022-02-12*

I loved this app and it was going so well but before I finished the first section the sound quit working. Thank have an iPhone 11 Pro and it is not on silent mode. I’m so sad because this would be an amazing app otherwise 😢

### 1/5 — Poor development, lots of bugs, no support

*2021-11-30, version 2.8.0*

I’ve tried using this app off and on, but there are far too many bugs for this to be useable. The audio stops working randomly. Awful GUI.  The app crashes. I have a paid account, but I can’t access that account on my iPad, only on my iPhone. When you try to find support, the only place you can go is a community forum, which no one responds to.

### 3/5 — Great app, but audio stutters

*2021-04-18*

I have last years iPhone and the audio stutters in Sonid. Is there any way to fix this?

**Developer response:** Thanks for the review. I am aware of the issue. If you want to help please send me an email with a video where the stuttering happens.

## Frequently asked questions about Learn music theory with Sonid

### 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.

## Version history (last 5 releases)

### 5.5.0 — 2026-09-03

- revised exercise pick & create screen
- small bug fixes

### 5.4.0 — 2026-08-28

What’s New in 5.4

Compete, connect, and focus on what you need to improve.

Leaderboards — See top learners on daily, weekly, and monthly XP boards. Tap a profile to view stats and achievements.

Your profile & avatar — Show up with a personal avatar on the leaderboard. Plus members can pick a style and reroll their look.

Friends — Every account gets a unique @handle. Share your profile, find friends by @handle, and follow learners you want to keep up with.

Following leaderboard (Plus) — A dedicated board for people you follow.

Analyse upgrades — See your top weak spots at a glance, get a nudge when new mistakes appear, and jump into targeted practice with Plus.

Smarter reminders — Practice reminders can mention your actual weak spots and take you straight to Analyse or practice.

Cleaner Learn — Less clutter on Learn so your habits and progress stay front and center.

Plus bug fixes and performance improvements.

### 5.3.0 — 2026-08-24

- New Sheet Music course: learn notes, clefs, rhythm, and key signatures on the staff. Switch course at any time.
- Anonymous Shared assignments: send a practice link or QR code and track results.
- Featured assignment list for in app events!
- New and improved analyse charts & heat maps!
- Small bug fixes.

### 5.0.6 — 2026-07-24

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

### 5.0.3 — 2026-07-18

Minimal bugfix

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## More apps by Martijn Ensing

- [Capo: Guitar Chords & Scales](https://appshunter.io/ios/app/capo-guitar-chords-and-scales/id1523517953)
- [Directus Mobile](https://appshunter.io/ios/app/directus-mobile/id6740696350)

All apps by Martijn Ensing: https://appshunter.io/developer/1490221761

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*