價格：免費
檔案大小：23.4 MB
版本需求：需要 iOS 10.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Through Scale Box, user can practise different piano scales of different grades in the exam. The app will draw out the name of the scale in voice and text format, user can listen or view the name the scale, and play on the piano.
支援平台：iPhone, iPad