This is the 3045th most frequent Japanese word.
モバイル
"Mobile" (referring to portable electronic devices or mobile technology).
In this sentence, 'モバイル' is used to refer to portable electronic devices like smartphones or tablets.
新しいモバイル端末を購入しました。
I bought a new mobile device.
Here, 'モバイル' modifies 'アプリ' (application) to specify that the application is intended for mobile devices.
モバイルアプリを開発しています。
I am developing a mobile application.
In this example, 'モバイル' refers to the mobile environment, covering devices and browsing interfaces.