Space Play · R Replay · N Next · 1–8 Choose · F Full Screen · S Settings · T Timer
Settings
Clef
Starting Note
Chord Type
Interval Range
Direction
Session Length
Playback
Difficulty
Display
💡
⏱ Challenge
Pick the sub-mode and timer duration, then press Start. Answer as many questions as you can before the timer runs out.
⏱ Challenge2:000 correct ·
0 answered
Find: —🎤 Starting mic…Tip: tap any note to hear its pitch
🎤 Rest your phone near the piano
🎤 Starting mic…Tip: tap any note to hear its pitch
🎤 Rest your phone near the piano
Choose the Interval
Click "Play Interval" to begin. Listen, then choose the interval below or sing the 2nd note.
0
Correct
0
Total
0%
Accuracy
0/20
Notes
0
⚡ Points
⠿⏱ Timer
05:00
Custom
:
🎼 All Generated Notes
How to Use
1. Configure the interval range, direction, and clef in the ⚙ Settings panel (open it with the ⚙ Settings button, top-left).
2. Listen. The app plays the 1st note then the 2nd. Click Replay to hear it again.
3. Identify the interval by clicking the matching button (2nd, 3rd, 4th, etc.).
4. Continue. Correct answers auto-advance. Wrong answers show the correct answer and wait for you to click Next Note.
5. When the session ends you'll get a per-interval breakdown and an option to Review your mistakes.
Tips: Set session length and auto-play in the ⚙ Settings panel (top-left).
Keyboard shortcuts:Space Play · R Replay · N Next · 1–8 Pick interval · F Full Screen · S Settings · T Timer.
Good morning,
Ready to sharpen your eye today?
👋
What should we call you?
Quick one-time thing: we'll use it to greet you on the home screen from now on.
👋
Welcome to Interval Hero!
Interval Hero trains your eyes to read intervals at a glance, so sight-reading stops feeling like decoding one note at a time.
New here? Start with 🎮 Game Mode. It walks you through every skill in short, easy-first levels and unlocks your rank as you go, from 🌱 Interval Rookie up to 👑 Interval Maestro.
Take your time. Mistakes are part of how it trains your eye.
📲
Add Interval Hero to your Home Screen
📲
Install Interval Hero
Opens instantly from your home screen, with no browser bar.
🎉
Nice work!
That's your free trial session. Create a free account to save your progress and keep training across Chain, 5-Note Range, Guide Notes and Game Mode. Pro adds the rest: Find the Start, Play the Note, Chord Inversions and more.
You've hit today's practice limit on a free account. Come back tomorrow for more, or ask your teacher to upgrade your account for unlimited daily practice.
You changed some settings. Apply uses them and starts a new session. Cancel puts everything back the way it was.
🏆
Time for a Checkpoint!
You've made real progress. This is a quick check-in to see where you stand. It's not a test you can fail, and nothing changes if you'd rather wait.
What it covers
🎵
Guide Notes
Naming notes on the staff
🔎
Find the Start
From a guide note to any note
🎹
Chord Inversions
Reading the shape at a glance
🎧
Play the Note
Mic-checked as you play
50 questions · 18 minutes · one attempt
🎯
Nothing new to learn here
Where you learned it
🎵
How will you play the notes?
You'll play each note on your instrument and the app confirms it. Choose your input:
Why this order?
Each mode builds on the one before it, so work through them from left to right.
5-Note Range. Every note stays in one hand position, so you learn to see small intervals quickly before the notes move far.
Chain. The same interval reading, but now the notes can travel anywhere, up to an octave. You read the gap, not each note name.
Guide Notes. Six landmark C's give you a fixed point anywhere on the grand staff, so a big leap never leaves you lost.
Find the Start. Put the landmarks to work: for any note, find a C near it and read the interval from that C. It's how you find the first note on the piano.
Play the Note. Now you play what you read on your instrument, and the app checks every note. This is where reading turns into playing.
Chord Inversions. Once single notes are quick, you read several at once by spotting the chord's shape.
⏱ Challenge has no number: use it after any mode to test that skill against the clock.
Highly recommended if this is your first time.
Ready to start?
Clef
Sound
With sound off you can still tap a note on the staff to hear it.
🎹
Chord Inversions — how it works
Look at the chord on the staff and work out which inversion it is.
Tap the matching answer button (Root Position / 1st / 2nd).
Then play the chord on your instrument as a roll — lowest note to highest, one note at a time. Play them in order: an out-of-order note won’t count. Each note lights up green as the mic hears it.
Play the chord shown on the staff as a roll — lowest note to highest, one note at a time, in order. Each note lights up green as the mic hears it. No tapping — clear as many chords as you can before the timer runs out.
📘 Interval Hero Guide
Game Mode now walks you through each skill step by step as you play. This is the quick visual reference to come back to any time.
About This App
This app focuses on pitch reading (the pattern and movement of notes), not rhythm, and not interval quality (no minor 2nds, augmented 5ths, etc). We believe strong note reading doesn't need accidentals. The core trick: intervals are either odd (3rd, 5th, 7th: line-to-line or space-to-space) or even (2nd, 4th, 6th, 8ve: line-to-space or space-to-line). See it in action below.
The Odd / Even Trick in Motion
Odd intervals stay line-to-line or space-to-space; even ones cross line-to-space.
Recommended Way to Use This App
Start with 5-Note Range: everything stays in one hand position, so it's the fastest way to build speed. Try both Melodic and Harmonic Intervals, then test yourself in Challenge mode.
Move to Chain: same skills, just a wider range. Challenge mode again once it feels easy.
Learn the Guide Notes (GIF below): lock in the six landmark C's, on both the staff and the keyboard.
Practise Find the Start: for any note, put a C near it on its exact line or space, then read the interval from that C. It's the worked example below, as a drill.
Do a 5-Note Range Challenge, then hit Full Screen and play through every note on your instrument at your own pace, racing the clock.
Test yourself in real time with Play the Note: read each interval and play it immediately; the mic checks every note as you go.
Finish with Chord Inversions: recognize the shape, not the notes. See the GIF below for exactly how the pattern works, for triads and 7ths.
Guide Notes: Landmarks on the Staff & Piano
The six landmark C's, mapped from the grand staff to the matching piano key.
Finding Any Note From a Guide Note
Worked example: (1) find the closest guide note to the note you're reading, (2) count the interval between them, (3) follow it straight down to the key. Find the Start drills steps 1 and 2.
Chord Inversions
To invert, lift the lowest note up an octave (orange). Repeat and the chord cycles back to root, just higher (shown for a triad and a 7th).
📊 My Progress
🎮 Game Mode
Work through seven levels, in order. Each one unlocks the next once you pass it. This is a guided path through the same modes above; nothing here is locked away from the regular tabs.
📋 Assignments
Practice focuses your teacher sent you. Starting one sets up the tabs above automatically. Just play through it like normal.
🎉
Session complete!
⚡
App score unlocked!
You've earned it. With App score on, a timer runs on every practice question: get it right first time, and the faster you answer, the more points you get.
Most modes
Play the Note
Find the Start
Full marks
10 under 2 s
20 under 3 s
20 under 7 s
Then
1 less each second
2 less each second
2 less each second
Nothing from
11 s
12 s
14 s
Points from every mode add up for this week's App score leaderboard, and your best session in each mode is kept for the week. Checkpoint, the Challenge tab and mistake reviews don't score. You can switch it on or off any time on the Leaderboard.