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Drop Thinking.
Start Playing.

不用想
自由彈

The reflex trainer that turns chord theories into muscle memory — in any key, freely.

將和弦理論變成肌肉記憶——任何調、即時反應。

Join the Beta — Free 免費加入 Beta See How It Works 了解如何運作
The Problem 你的痛點

You know the theory.
But can you react fast enough?

理論你都明白了。
但你反應得夠快嗎？

Most musicians understand theories like Roman Numeral and chord types — until the key changes.

很多人「理解」和弦級數、音階…… 直到台上突然要轉 Key，發現腦袋瞬間當機。

⚡

Key Change Freeze

轉 Key 當機

The band leader says "up two keys" and your hands stop. You know the theory, but your fingers can't keep up in real time.

Band leader 說「升兩個 Key」，你的手只能停下。理論你懂，但手指跟不上即時反應。

🎯

Theory ≠ Performance實戰

Knowing I–V–vi–IV on paper is not the same as instantly playing it in E♭. There's a gap between knowledge and reflex.

紙上懂得 I–V–vi–IV，和隨時能彈 E♭ 的 IV 和弦，是兩回事。知識和反射之間，有一段距離。

📊

No Way to Measure

無法量化

YouTube teaches theory. Books explain harmony. But nothing lets you quantify your tonal reflex and track real improvement over time.

YouTube 教理論、書本教和聲，但有什麼工具能量化你對和弦的熟悉度？能真正追蹤你的進度？

How ChordReflex Helps ChordReflex 如何幫助你

Not another theory app.
A reflex trainer.

不教樂理。
只訓練反射。

ChordReflex doesn't teach you more theory — it trains you to react so fast that thinking becomes optional.

ChordReflex 不教你理論，而是訓練你的反應速度，快到不用想。

780ms

Speed

速度

Track your reaction time in milliseconds. Lightning-fast responses earn bonus points and unlock achievements.

以毫秒追蹤你的反應時間。答得快還可以解鎖特別成就。

96%

Accuracy

準確度

Per-key accuracy tracking shows exactly where you're solid and where you need work. No more hiding behind easy keys.

追蹤每個 Key 的準確率，清楚顯示哪裡穩定、哪裡需要加強。帶你慢慢走出「舒適Key」。

↑

Reflex

反射

EWMA trend analysis shows your long-term trajectory. Imagine how satisfying it is to see weeks of progress.

EWMA 趨勢分析，顯示你的長期軌跡。試想像看著自己幾個星期以來的進步。

How It Works 使用方式

Three steps. Ten minutes a day.

三個步驟，每日只需十分鐘。

Short, focused sessions that build real muscle memory over time.

練習短而集中，隨時間建立真正的肌肉記憶。

Choose Your Key

選 Key

Pick a single key to focus on, or turn on Random Keys mode to train across all 12 keys — just like a real session.

選擇「Single Key」專注練習，或者開啟「Random Key」隨機模式——就像真正的表演。

React to the Degree

看到級數，作出回答

A scale degree flashes on screen. Tap the correct chord on the keyboard — as fast as you can. Your reaction time is recorded in milliseconds.

畫面閃出一個級數，儘快按下正確的 Chord —— 越快越好。你的反應時間會以毫秒記錄。

Track Your Progress

追蹤進步

See accuracy and speed trends for every key. Unlock speed stats when your accuracy proves you're ready. Watch yourself improve over weeks.

查看每個 Key 的準確率及速度趨勢。只有準確率證明你準備好，速度數據才會解鎖。準備好見證自己每週的進步吧！

Data-Driven Progress 數據驅動的進步

Your improvement,
measured in milliseconds.

你的進步，
以毫秒計算。

ChordReflex tracks every answer — speed, accuracy, and trend — so you always know exactly where you stand.

ChordReflex 追蹤每一次作答——速度、準確率、趨勢——令你隨時清楚自己的狀態。

No more guessing if you're "getting better." See your reflex sharpen in real data.

不用再自我懷疑「有進步嗎？」。用真實數據見證你已經對 Chord Progression 變得更敏銳。

The EWMA algorithm ensures one bad day doesn't tank your stats. Only consistent change moves the needle.

EWMA 演算法確保短期表現不會拖垮你的數據。只有持續的變化才會移動指針。

⚡
780ms
Average Reaction Time
平均反應時間
↑ 120ms faster than last week
↑ 比上星期快 120ms
🎯
96.2%
Overall Accuracy
整體準確率
↑ Improving steadily
↑ 穩步提升中
🔥
23
Best Streak
最佳連續答對
3.0x multiplier unlocked
已解鎖 三倍加乘
📈
12 / 12
Keys Practiced
已練習的調
Session-Ready across all keys
全部調已達「Session-Ready」
Features 功能特色

Built by a musician, for musicians.

由音樂人打造，為音樂人而設。

Every feature exists because a real musician needed it during real practice.

每一個功能，都源自一個真正音樂人的真實困難。

✓

Single Key & Random Keys Mode

一調模式 & 隨機調模式

Focus on one key or train across all 12 with automatic key changes that is customisable.

專注一個調，或者開啟自動轉調，每隔一段時間切換一次。

✓

Millisecond Reaction Tracking

毫秒級反應追蹤

Every answer timed to the millisecond. Speed bonuses reward lightning-fast reflexes.

每次作答精確計時至毫秒。極速答對可獲得額外獎勵。

✓

Per-Key Performance Stats

獨立表現統計

See accuracy and speed for each of the 12 keys. Know exactly where your weak spots are.

查看 12 個調各自的準確率和速度，精確知道你的強項和弱點。

✓

EWMA Trend Analysis

EWMA 趨勢分析

Exponentially weighted moving averages show your true trajectory, not just today's score.

指數加權移動平均顯示你的真實軌跡，不只是表面的分數。

✓

Score & Streak System

分數 & 連勝系統

Earn points, build streaks up to 3x multiplier, and compete against your own best.

賺取分數、連勝直至得到 3 倍加乘，與昨日的自己切磋。

✓

Audio & Haptic Feedback

音效 & 觸感回饋

Instant sound and haptic response for correct and incorrect answers. Satisfying just like a real instrument.

答對答錯都即時有聲音和震動，像真正樂器般滿足。

Why I Built This 開發者的故事

Born from a real pain point.

源自一個真實的痛點。

Jimmy at the piano — ChordReflex creator

I kept freezing every time the key changed during rehearsals. Trust me I know the concept of chord degree very well, but my fingers just couldn't keep up under pressure… I looked for a tool that could train my reflex, but I end up only finding more theory tutorials. So I built one myself.

有幾次崇拜 rehearsal 時突然要轉 key，我即刻 freeze 左。。。明明我應該要知道 IV Chord 係咩，但一緊張手指就完全跟唔上。我試過搵可以訓練 Chord Progression 嘅工具，但搵到嘅只有 Theory 教學。所以我決定自己寫一個。

Jimmy, Creator of ChordReflex Jimmy, ChordReflex 開發者
iOS Developer & Musician iOS Developer & 音樂人
Get Early Access 搶先體驗

Ready to train your reflex?

準備好訓練了嗎？

Join the beta and be the first to turn your Nashville Number knowledge into real muscle memory.

加入 Beta 測試，將知識轉化成真正的肌肉記憶。

FAQ

Common Questions

常見問題

It's a method of representing chords by their scale degree (I, ii, iii…) instead of note names (C, D, E…). This makes it easy to transpose songs to any key instantly — if you have the fluency for it.

一種用級數（I, ii, iii…）代替音名（C, D, E…）標記和弦的方法。只要你足夠熟悉，就可以即時將歌曲轉到任何調。

You should know basic chords and scale degrees. ChordReflex is not a theory teacher — it's a reflex trainer for musicians who already understand the basics but want to react faster.

你需要認識基本和弦和級數。ChordReflex 不教樂理——比較適合已有基礎、但想反應更快的音樂人做訓練工具。

iOS first (iPhone). iPad and Mac support are planned for future versions.

我們暫時支援 iOS（iPhone）。iPad 同 Mac 版本會在未來版本推出。

Yes. Beta testers get free access via TestFlight. Your feedback will directly shape the final product. A Pro version with additional features will be available at launch.

對，完全免費。Beta 測試者可以透過 TestFlight 免費使用。你的意見會直接影響最終產品。正式推出時會有包含更多功能的 Pro 版本。

MIDI input is planned for v2, so you can practice with your actual keyboard. The current version uses an on-screen piano keyboard.

MIDI 輸入已計劃於 v2 推出，屆時你可以連接你的樂器練習。目前版本則可以使用螢幕上的鋼琴鍵盤。