用 123／Do-Re-Mi 組和弦路、轉調、彈出來——大人伴奏、小孩摸索，同一張琴凳。不追螢幕上跑的音符。
組路 · 轉調 · 彈出來——工具，不是課程。
Build chord paths with 123 / Do-Re-Mi, transpose, and play — for accompanying at church, home, or lessons. Not chasing notes on a screen.
A buy-once tool, not a course subscription.
組路、轉調、接上鋼琴出聲。沒有闖關打分——用自己的節奏。
ABC 可並排。轉調時數字／唱名邏輯不變，字母跟著走。
路徑（卡片＋Key＋拍速）與 Jam 錄音。資料在這台裝置；刪 App 會清空。
Build paths, transpose, hear it on a piano. No levels or scores — your own pace.
ABC optional alongside. When you transpose, numbers and solfege stay; letters follow.
Paths (cards + key + tempo) and Jam takes. On this device; deleting the app clears them.