Harmonize

Harmonize is an ear-training game that turns interval practice into playful challenges for singers and instrumentalists. Players listen to a reference tone and slide their finger to "harmonize" intervals—unison, octave, perfect fifths/fourths, major and minor thirds and sixths—trying to match pitch exactly; scores are judged by cents deviation and collecting three stars advances you to the next stage. Guided practice, cute mascots Ebifurya and Kakifurya, and short levels make Harmonize a convenient way to sharpen relative pitch through focused gameplay sessions.

Key Features

⭐ Intuitive slide-to-pitch gameplay where you match a model tone and earn stars based on how many cents off you are.

⭐ Harmonize's modes include Double Stop (two-note harmonizing), unlockable Chords with real 3–4 voice textures, a One-Shot Challenge with five weekly questions and an online leaderboard, plus a step-by-step Tutorial for beginners.

⭐ Charming presentation and progression: practice alongside mascots Ebifurya and Kakifurya as stages become progressively more demanding.

⭐ Rich sound and tuning options with 14 instrument tones such as piano, organ, violin, trumpet, shakuhachi and flute, plus adjustable A reference from 440–446 Hz.

⭐ Customization and accessibility tools like per-voice volume and vibrato, multiple note-name notations (English/German/Japanese/Italian), toggleable guide bubbles and background animation, and an optional Remove Ads purchase.

Advantages

✅ Precise feedback: immediate cents-based scoring helps players identify and correct small pitch errors.

✅ Flexible practice flow: short stages, three-star progression and a dedicated Tutorial make the game suitable for both beginners and experienced musicians.

✅ Broad musical use: useful for choirs, wind ensembles, orchestras, bands and singer-songwriters who want to improve harmonizing skills.

✅ Localization and tuning flexibility: supports seven languages and multiple note-name systems while allowing fine adjustments to tuning and instrument timbres.

Disadvantages

❎ Ads appear in the free experience unless you purchase the Remove Ads option.

❎ Chords mode is locked behind star progression, so advanced harmonic exercises require time to unlock.

❎ The One-Shot Challenge is competitive and the model tone plays only once per question, which may frustrate players who prefer repeated practice for the same item.