Harmonize: Ear Trainer & Pitch

🎵 Ear training that sticks — 15 games for intervals, chords, rhythm and playing melodies by ear. Free to start, no account needed.

Most ear trainers ask you to pick the answer from a list. Harmonize asks you to *make* the sound: slide to harmonize against a reference tone, play a melody back on a keyboard, tap a rhythm. Producing the interval yourself is what makes it stay. Train with the cute mascots Ebifurya and Kakifurya.

▼ 15 games
• Double Stop — harmonize two notes: unison, octave, perfect 5th/4th, major/minor 3rds and 6ths (8 categories)
• Chords — real 3–4 voice chords, unlocked as you collect stars
• Moon — the reference tone fades away; harmonize from memory alone
• Low Register — bass instruments, where intervals are hardest to hear
• Trill — train the speed and evenness of your trill
• Ear Copy — listen to a melody and play it back on the keyboard (9 categories, 129 levels)
• Sight Reading — read notes on the staff and play them on the keyboard (9 categories, 180 levels, 1,020 exercises)
• Rhythm — tap the offbeats with the metronome: 6 meters from march to sixteenths × 8 sound packs
• Polyrhythm — two hands, two pulses at once
• Mimic Drum — call and response: hear a rhythm, drum it back
• Takoyaki — a memory game where the pairs match by pitch
• Scales — major, minor and the church modes
• Arpeggio — chord arpeggios in just intonation
• Goldfish Scoop — tell the goldfish apart by their tone
• Silent — no sound at all: count the seconds with your internal clock

▼ Tools and extras
• Weekly Challenge — 5 questions, one shot each, with an online leaderboard
• Metronome and Tuner built in
• Tutorial for complete beginners

▼ Built for real practice
• 18 instrument tones — 14 for the main games (piano, organ, violin, trumpet, shakuhachi, flute…) plus 4 bass instruments for Low Register
• Adjustable A reference (440–446 Hz)
• Note names in English, German, Japanese or Italian
• Per-voice volume and vibrato
• Rhythm timing calibration — accurate judgement even with Bluetooth earphones
• Cent-level feedback: see exactly how far off you were

▼ 8 languages
English, 日本語, Français, Deutsch, Español, Italiano, 简体中文, 한국어 — switch anytime in Settings.

Free to play, with an optional one-time purchase to remove ads or unlock PRO games. No subscription.

For choirs, wind ensembles, orchestras, bands, singer-songwriters, and anyone learning an instrument — train your ear a few minutes a day.

Recent changes:
Achievement badges (57): land on and conquer stages, earn three stars and each stage's own perfect, keep a streak, try the tuner and sounds. Unearned badges show their conditions, so the list maps features you have not tried. Open it from the top right of home.
Perfect-score celebration: when a whole category reaches three stars, a hanamaru stamp and fireworks show what you achieved.
Challenge results add a "practise your weakest" button.
Wider ad banners, smoother transitions and fixes.