Each page is here.
それぞれのページはこちらです。
—
English Support Page
Chord NOTE
https://therootage.com/iphone/chord-note-en/
Guitar Kit
https://therootage.com/iphone/guitar-kit-en/
Piano Kit
https://therootage.com/iphone/piano-kit-en/
—
日本語サポートページ
Chord NOTE
https://therootage.com/iphone/chord-note-ja/
Guitar Kit
https://therootage.com/iphone/guitar-kit-ja/