價格：免費
檔案大小：13.7 MB
版本需求：系統需求：iOS 13.0 與 watchOS 6.1 或以後版本。相容裝置：iPhone、iPad、iPod touch。
支援語言：英語
The user chooses from six buttoms (E A D G B E), which correspond to the six different strings on a guitar. The user then presses the button that is needed, listens with their guitar, and tunes their guitar.
