Interval Calculator & Quiz6.0.0 - App Store

Intervals are a core part of music theory. By understanding the concepts and practicing consistently, anyone can build a solid foundation in music. This app is divided into four areas-Interval Theory, Interval Calculator, Interval Test, and Interval Ear Training-with each area offering focused, specialized learning.

* Interval Theory

The theory section explains interval numbers (2nd, 3rd, etc.), simple and compound intervals, harmonic and melodic intervals, inverted intervals, and interval calculation in a clear, structured way-so anyone can understand the underlying principles with ease.

* Interval Calculator

Once you understand the theory, try calculating intervals yourself. When you place two notes on a staff, the interval name is calculated and displayed instantly. The same notes are also shown on a piano keyboard, helping you understand intervals more intuitively. You can also set key signatures and clefs to calculate more complex intervals with ease.

* Interval Test

You can choose options such as key signatures, accidentals, staff types, and clefs to create the kinds of interval questions you want. Build your skills by solving problems like a game-the tougher the options and the higher your score, the more dazzling the fireworks, giving you a strong sense of achievement.

* Interval Ear Training

It's essential to recognize the unique "color" of each interval by ear. With practice, you can sharpen your listening skills. Choose relative or absolute pitch, melodic or harmonic intervals, difficulty level, and playback speed to create your own personalized ear-training sessions.

* Interval Sight-Singing

On the Interval Calculator screen, you can practice interval sight-singing by playing two notes one after another. The two notes are played about 2 seconds apart. After hearing the first note, imagine the pitch of the second note in your mind and sing it aloud. Then compare your own pitch with the note that actually plays to improve your ear and sense of pitch.

The developer of this app has experience teaching students in a university music department. Drawing on that experience, the app was designed to help you understand music theory in a musical and practical way. We hope it will be a valuable resource for your musical journey.

Formerly known as "Interval Test"

Version History * 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. 6.0.0 Sep 25 * In the Interval Calculator, fixed an issue where accidental spacing appeared uneven for a unison with accidentals on both notes when the 'Chord' playback setting was selected.
* Harmonic Interval Ear Training has been improved to support not only half notes, but also quarter, eighth, and sixteenth notes.
* The app name has been changed from "Interval Test" to "Interval Calculator & Quiz." 5.9.85 Sep 2 We've completely replaced the sound engine for more accurate, cleaner piano playback, and resolved the click/pop noise issue that occurred on the latest iPhone models.
Fixed various minor bugs to improve overall stability. 5.9.7 Jul 24 New Features
Added a Mistake Notebook feature — collect and retry interval questions and ear training items you got wrong.
Added a score trend graph on the score screen, showing your last 10 results.

Improvements
In Interval Ear Training, you can now choose to display the answer as notation or text, and check it with a single button.
Enlarged the keyboard in ear training questions for easier tapping.

Bug Fixes
Fixed an issue on some devices where audio would stop during Interval Ear Training, requiring an app restart.
Fixed an issue where the play button in Interval Ear Training was occasionally unresponsive to taps. 5.9.6 Jul 21 * Wrong-answer explanations have been added to Interval Quizzes. Now, even if you get a question wrong, you can easily see why.
* At Level 1, both the abbreviation and the full interval name are shown. At Level 2 and above, only the interval abbreviation (P/M/m/A/d) is shown. 5.9.0 Feb 4 • New questions have been added so you can test yourself immediately while learning interval theory.
• Improved the overall look and readability of the sheet music display.
• Refined the card side margins on the Interval Calculator and Interval Quiz screens for a cleaner layout.
• Added a fast score count-up animation when you achieve 100 points in the Interval and Ear Training quizzes. 5.5.8 Jan 23 • Interval Quiz difficulty levels have been expanded from 1–4 to 1–5. The difficulty curve has been adjusted to increase more gradually.
• A Similar Intervals mode has been added to Ear Training. Practice by grouping and comparing intervals with a similar sound color (2nd·3rd, 6th·7th, 4th·5th). 5.5.0 Jan 13 · Improved the UI for better readability, visibility, and overall usability.
· Added interval ear training. You can now learn the unique “sound color” of each interval by ear.
· Added key signature selection and English abbreviation labels to the Interval Calculator.
· Improved quiz difficulty balance and added a higher difficulty option.
· Updated the app icon to a new design featuring two quarter notes connected by a diagonal arrow. 5.3.9 Jan 10 · Improved the UI for better readability, visibility, and overall usability.
· Added interval ear training. You can now learn the unique “sound color” of each interval by ear.
· Added key signature selection and English abbreviation labels to the Interval Calculator.
· Improved quiz difficulty balance and added a higher difficulty option.
· Updated the app icon to a new design featuring two quarter notes connected by a diagonal arrow. 5.3.7 Jan 9 · Improved the UI for better readability, visibility, and overall usability.
· Added interval ear training. You can now learn the unique “sound color” of each interval by ear.
· Added key signature selection and English abbreviation labels to the Interval Calculator.
· Improved quiz difficulty balance and added a higher difficulty option.
· Updated the app icon to a new design featuring two quarter notes connected by a diagonal arrow. 5.3.6 Jan 8 * The existing animation remains unchanged despite the user changing an option on Your Score.
* The app's name has changed from 'Music Interval App' to 'Interval Test'. 1.48 05/02/2024 Receiving a perfect score on the interval questions will allow you to see a variety of nice animations. 1.45 03/25/2024 • Change animation effects
The animation of the your score background has been changed to the night sky.

• Sound mute button
The Interval Test now has a sound on/off function. but, the mute function is not applied on Measuring Intervals.

• Save options
Now the options that the clef, number of questions, and difficulty level you set will be saved. So, even if you close this app completely, all existing option values will not be lost. 1.31 10/12/2023 Now, Users can select 25 number of questions on the interval test menu for users who want to solve more questions at one time. 1.2 12/31/2021 After the 15.1 version update, the bug that the keyboards on the "Interval Test I" and "Measuring Intervals I" were incorrectly displayed has been fixed. 1.1 11/17/2021 1.0 10/14/2021