Pitch trainer - Harmonize
Pitch trainer - Harmonize Summary
Pitch trainer - Harmonize is a ad-supported Android app in Music by Toshihiko Arai. Released in Jan 2017 (9 years ago). It has about 58.2K+ installs and 556 ratings with a 4.20★ (good) average. Based on AppGoblin estimates, it reaches roughly 1.5K monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store metadata: updated Jan 28, 2026, version 22.
Recent activity: 49 installs this week (156 over 4 weeks) showing exceptional growth View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Feb 9, 2026. The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Jul 16, 2025.
Store info: Last updated on Google Play on Jan 28, 2026 (version 22).
Pitch trainer - Harmonize was last scanned for SDKs 2026-02-09. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Google
AdMob4.2★
Ratings: 556
Screenshots
App Description
Just intonation ear training App.
An app anyone can enjoy with which you learn to have perfect and relative pitch. Especially suited to those learning the chords of just intonation.
This app is beloved by many, from those who want to be good at karaoke to brass band and orchestra members.
Hello everyone.
This "Music Game" app is the sequel of my previous work.
This time, the focus lies on learning double-stop notes (just intonation).
In this app, two sounds are played at the same time, but the decision is calculated on the basis of just intonation.
For example, when matching major third "do" and "mi", there is a gap of 4 semi-tones, so in equal temperament there is an interval of 400 cents.
However, in just intonation, "mi" has a 5/4 frequency ratio to "do", so when calculated, the interval becomes (1200 x log2 (fE / fC) =) 386.3... cents.
This means that for the piano (equal temperament) interval you have to take a minor interval of approximately -14 cents.
Therefore, use the piano sound only as a guide, and match the tone of the sound by feel.
The trick is to operate it so you lose the beat. It will suddenly become a clear sound at a certain position. That will be the just interval tone.
※Chords reference tone is A=442 Hz.