Tonality Visualizer vs Piano Chord
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tonality Visualizer
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Tonality Visualizer is an interactive polar-pitch map that displays musical notes on a rotating disk. You can connect a MIDI keyboard or open a MIDI file — every note appears in real time. The app helps you see harmony, motion, and chord relationships, even without formal music theory. Main Features •MIDI Input: visualize notes directly from your keyboard or MIDI device. •MIDI File Playback / Trainer Mode: play or practice chord by chord. •Live Sound Option: enable/disable the built-in synth for input playback. •Physics-based Disk Rotation: the disk moves naturally according to musical torque. •Simple UI: switch between water-fixed / disk-fixed anchors, toggle UI visibility, bilingual JP/EN. Perfect for music learners, creators, and anyone who wants to “see” sound. Privacy No data collection. All processing happens locally on your device. License Open-source under the MIT License. Source code available on GitHub. Supported Formats •.mid / .midi files (Format 0 / 1) •CoreMIDI device input
Piano Chord
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Piano Chordは、ピアノのコードを直感的に鳴らすことができる音楽アプリです。 【3つのモード】 ■ 再生モード ルート (CDEFGAB + # )の12音と、16種のコードをタップすることで直感的にコードの演奏が可能。 鍵盤ハイライトでコードの構成音を視覚的に確認できます。 ■ コード進行モード 4つのコードを登録してループ再生が可能。 再生しながらリアルタイムでコードを変更できるのでセッションや作曲のアイデア出しに最適です。 ■ マルチビューモード 4画面・8画面で複数のコードを同時に比較。コード同士の響きの違いを直感的に把握できます。 【主な機能】 ・16種のコード(トライアド・7th・6th/9th) ・5種のスケール(メジャー・マイナー・ペンタトニック・ブルース) ・SoundFont音源によるリアルタイム発音 ・ルート音カラーと構成音カラーのカスタマイズ ・マスター音量・トランスポーズ設定
Screenshots
Verdict
The clearest difference is update cadence: Piano Chord at every 5 days against Tonality Visualizer's fortnightly. Piano Chord also leads on iOS requirement (13.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Tonality Visualizer ships an update fortnightly, Piano Chord every 5 days. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.
| Parameter | Tonality Visualizer | Piano Chord |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 39 MB | 167 MB |
| Age rating | 4+ | 4+ |
| Developer | Yusuke Yoshida | Hideaki Sato |
In-app purchases
Tonality Visualizer
No in-app purchases
Piano Chord
No in-app purchases
Questions
Is Tonality Visualizer free?
Is Piano Chord free?
Do Tonality Visualizer or Piano Chord have ads?
Which is updated more often, Tonality Visualizer or Piano Chord?
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