Interval: Music Theory
Ear training & theory quiz
Only for iPhone
$3.99 · Designed for iPhone. Not verified for macOS.
iPhone
Interval turns scattered music theory drills into a measurable practice habit. Whether you're prepping for a theory exam, returning to an instrument, or sharpening your ear, Interval gives you fast, focused exercises with instant feedback, mastery tracking, and a clean, modern interface — no subscriptions, no account, fully offline.
WHAT YOU CAN PRACTICE
• Interval identification — read two-note intervals and name them
• Scale identification — major, minor, modes, pentatonic, and more
• Chord identification — triad and seventh-chord qualities
• Keyboard exercises — tap the piano to answer, or name highlighted keys
• Ear training — interval, chord, and scale recognition by sound
BUILT FOR REAL PROGRESS
• Mastery rings for every skill so you always know where you stand
• Session summaries that show exactly what you missed
• Per-skill stats and accuracy trends over time
DESIGNED TO BE FAST AND FOCUSED
• Procedurally generated exercises — practice never runs out
• Multiple-choice and tap-the-piano answers
• Instant grading with gentle haptics and optional auto-advance
PRIVACY FIRST
Interval works entirely on your device. There's no account, no tracking, and no data collection. Your practice stays yours.
ONE-TIME PURCHASE
Buy once and own it — everything is included. No subscriptions, ever.
Perfect for music students, self-learners, and teachers who want a reliable, affordable way to master the fundamentals.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Refreshed the App Store preview images to better show what the app does. No changes to the app itself in this update.
The developer, Brian Boler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Brian Boler
- Size
- 1.1 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Brian Boler
