Every One Beleive in this world that he will die one day. even if they are Muslims or any other religion and after that, almost all say after death there is no life.
but we as Muslims believe in the judgment day that's called Qayamat and it's our faith that one day we will be answerable to our Almighty ALLAH. so we have to prepare ourselves for that day which is called Qayamat.

in this application, you read the signs of Qayamat (the Judgment day) that our beloved Prophet Muhammad (ﷺ) told us.
in this application, you will know what to do or what will happen before judgment day will come.