Interval Calculator & Quiz

Interval Calculator & Quiz

Music Theory & Ear Training

7 ratings
5 reviews
Free
In-App Purchases

Details

Released
October 14, 2021
Updated
September 25, 2026

Features

Interval Calculator & Quiz video #1 for iPhone
Interval Calculator & Quiz video #2 for iPhone
Interval Calculator & Quiz screenshot #3 for iPhone
Interval Calculator & Quiz screenshot #4 for iPhone
Interval Calculator & Quiz screenshot #5 for iPhone
Interval Calculator & Quiz screenshot #6 for iPhone
Interval Calculator & Quiz screenshot #7 for iPhone
Interval Calculator & Quiz screenshot #8 for iPhone
Interval Calculator & Quiz screenshot #9 for iPhone
Interval Calculator & Quiz screenshot #10 for iPhone
iphone
ipad
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About

Learn music theory and practice ear training with interactive quizzes and an intuitive calculator. Understand interval concepts, calculate intervals on a staff or piano, and sharpen your listening skills through personalized exercises. Designed by a university-level music educator.

✓Interval theory explanations
✓Intuitive interval calculator
✓Customizable interval quizzes
✓Personalized ear training sessions
✓Instant feedback and scoring
✓Visual representation on staff and piano
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What's New in Interval Calculator & Quiz

6.0.0

September 25, 2026

* The app's design and UI have been improved across the board. * Difficulty 5 in Interval Test no longer includes triply augmented and triply diminished questions, and difficulty now rises in stages. * In Ear Training, Harmonic intervals now offer a longer note value (whole note). * The way Interval Test and Ear Training data is saved has changed, so your saved wrong answers will be reset.

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Subscriptions & In-App Purchases

$7.99

Music Interval App Premium

One-time purchase · Lifetime access · All features

User reviews

정말 잘 쓰고 있습니다! 그런데

혹시 코드 청음도 추가해주실 수 있나요?? 앱 너무너무 좋아요 딱 필요했어요

Response from developer

안녕하세요! 소중한 리뷰 남겨주셔서 진심으로 감사합니다. 문의하신 화음 청음 기능은 제가 개발 중인 '청음 퀴즈' 앱에 9월 말 또는 10월 초 업데이트를 통해 추가될 예정입니다. 이번 업데이트에서는 리듬 청음, 화음 청음 등 다양한 청음 기능을 새롭게 선보일 예정입니다. '청음 퀴즈'는 유료 앱이지만, 쉬운 난이도의 화음 청음 기능은 무료로도 이용하실 수 있도록 제공할 계획입니다. 감사합니다!

Bogus billing/Can’t upgrade/Do NOT buy!!

Wow, this is ridiculous. I would give zero stars if I could:

I paid for the upgrade to the app, but never received the upgrade.

I called Apple and they said I have to contact the developer. Ookaaay, but the page in the App Store has no way to contact the developer.

Apple says they can’t contact the developer. Ummmm, you communicated with them when you received the app from the developer, right? You communicated with the developer when you negotiated price and terms, right? Or did the app just magically appear in the App Store?

Since Apple manages purchases and upgrades directly with the consumer, shouldn’t there be a way for them to trigger the upgrade? Is it that they are too lazy to try to truly help the customer…Or maybe too cost conscious, or incompetent?

Definitely not the business model upon which Apple was founded.

It’s too bad because the basic app is quite good, but very limited.
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Response from developer

Our support contact has always been listed on the app's page, and we have no record of this issue being reported to us. Anyone experiencing an upgrade issue is welcome to contact us directly with their purchase details.

아이패드

아이패드에서는 다운이 안되나요?
검색해도 안나오네요

Response from developer

안녕하세요~ 지금에서야 리뷰를 보았습니다. 이앱은 아이폰 전용으로 만들었으므로, 아이패드에서는 검색이 안됩니다. 이점 양해를 부탁드립니다. 추후에 아이패드 개발도 고려해 보겠습니다.

음정 연습하기 좋아요

근데 문제 풀때 소리 안나게 할 수 있음 좋겠습니다
노래들으면서 문제 푸는데 자꾸 노래가 끊겨요 ㅠ

Response from developer

네~~ 좋은 의견 감사합니다~~ 다음 업 데이트때, 해당 기능을 넣겠습니다~

기능 추가해주세오

조 기능도 추가해줘서 AM 에서 일일히 파도솔 다 샵 누르는데 조 기능 꼭 추가해주세요! 그리고 악보 찍으면 인식 기능도 (어렵지만…) 해주시면 감사하겠습니다

Response from developer

네~ 사실 초반에 앱을 설계할 때 그 생각도 했었는데요~ 조표 + 임시표가 들어가면 까다로운 음정문제를 풀 때, 더 도움이 될것 같습니다. 그런데.. 여러 고민 끝에 임시표만으로도, 기본적인 음정을 이해하는데는 무리가 없다고 판단하여 조표를 넣는 것은 구현하지 않았습니다. 사실.. 조표가 들어가게 되면, 지금보다 더 복잡한 연산 시스템이 필요한데요~ 추후에 고려해보겠습니다~ 감사합니다.

Developer apps

FAQ

What is Interval Test?

Interval Test is an educational app designed to help users learn music theory and practice ear training. It offers sections for understanding interval concepts, calculating intervals, taking quizzes, and engaging in personalized ear training exercises.

How does Interval Test teach music theory?

Interval Test explains interval numbers, simple and compound intervals, harmonic and melodic intervals, and inverted intervals in a clear, structured manner. It also provides an interval calculator for hands-on practice.

Can I customize the quizzes in Interval Test?

Yes, you can customize interval quizzes by selecting options such as key signatures, accidentals, staff types, and clefs. This allows for tailored practice to build specific skills.

What kind of ear training does Interval Test offer?

Interval Test provides personalized ear training sessions where you can choose between relative or absolute pitch, melodic or harmonic intervals, difficulty levels, and playback speeds to sharpen your listening skills.

Is Interval Test suitable for beginners?

Yes, the app is designed to be understandable for anyone, drawing on the developer's experience teaching music students. It aims to provide a musical and practical approach to music theory.

What devices does Interval Test support?

Interval Test is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

How often is Interval Test updated?

The latest version of Interval Test is 5.9.0, and it was last updated on February 4, 2026. This indicates a commitment to ongoing development and improvements.

Does Interval Test have ads?

No, Interval Test does not contain advertisements, allowing for an uninterrupted learning experience. It does offer in-app purchases for additional features or content.