쓰고 싶은

that I want to use or write

→ 쓰다
phrase Uncommon #11,306
that I want to use or write 쓰고 싶은 is an adjectival form that comes before a noun. 쓰다 can mean “use,” “write,” “spend,” or “wear,” depending on context.
KO: 쓰고 싶은 앱이 있어요.
EN: There’s an app I want to use.