ホーム画面への追加方法
1.ブラウザの 
共有ボタンをタップ2.メニューの「ホーム画面に追加」をタップ
ROM, or Read-Only Memory, refers to the non-volatile memory storage in mobile devices that contains the device's firmware, operating system, and applications. In essence, ROM is the brain of the operation, controlling the device's hardware components and enabling them to interact with each other.