This is the 6409th most frequent Korean word.
앱이
"앱이" is a casual or phonetic reference to "app" (application) in Korean.
Here, '앱이' serves as the subject of a conditional clause, discussing the situation involving the app.
앱이 멈췄을 때 어떻게 해야 하나요?
What should we do when the app stops?
Here '앱이' refers to the subject (app in this case) of the sentence.
이 앱이 정말 좋아요.
This app is really good.
In this sentence, '앱이' is used as part of the subject, emphasizing the app being referred to as specific and previously mentioned.