Harmonize: Ear Training

Toshihiko Arai

Contains adsIn-app purchases

About this game

🎵 Harmonize is a fun ear-training game where you sharpen your relative pitch together with the cute mascots Ebifurya and Kakifurya.

Against a reference tone, slide your finger to “harmonize” musical intervals — unison, octave, perfect fifth/fourth, major/minor thirds and sixths — and match them exactly. The closer to 0 cents, the higher your score. Collect three stars to move on to the next stage!

▼ Simple to play
• Listen carefully to the model tone
• Slide up and down to match the pitch
• Tap GO to be judged — see how many cents off you were and your stars

▼ Modes
• Double Stop: harmonize two notes (8 categories)
• Chords: real 3–4 voice chords (unlock by collecting stars)
• One-Shot Challenge: 5 weekly questions, the model plays only once — compete on the online weekly leaderboard
• Tutorial: guided practice, perfect for beginners

▼ Thoughtful features
• 14 instrument tones (piano, organ, violin, trumpet, shakuhachi, flute and more)
• Adjustable A reference (440–446 Hz)
• Note-name notation: English / German / Japanese / Italian
• Toggle background animation and guide bubbles
• Per-voice volume and vibrato
• Optional "Remove Ads" in-app purchase

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

For choirs, wind ensembles, orchestras, bands, singer-songwriters — anyone who wants to harmonize more accurately. Train your ear, anytime!

Ratings and reviews

Wonderful!! That's what I was looking for! Please, add chords! As a woodwind player I always was limited by keys. We just press a key and think that it is in tune. But, string players always conscious about their pitch. That's why they have way better trained ear. This app allow me to train my ear the way as a string player sliding their finger to match the interval. Thank you! Please, add the chords.

I love the app, and it's a great tool to use with students to get them to focus in on pitch — however, the sound effects (applause, trombone noises) after each level can be distracting and disorienting. I wish I had the option to turn these off. By the same token, I wish I could pay to remove the ads as their music and sound effects are similarly distracting. The lack of a settings tab at all is a turn-off for me.

Adverts after every game - with each game lasting just a few seconds. The advert pops up so fast you don't even get to see your result. There's no opportunity to check your result or improve. It's definitely no good for "learning" or "improving" unless you're already very good in the first place. To see instructions on how to play, you have to leave the game and open a website. Why?!?! It is very pretty though. And there are lots and lots of levels to play. But I unistalled while still on Lv1

What’s new

• Fixed an issue where the app could not launch on devices with the Google Play Store disabled
• Minor improvements

Thanks for playing!