Only the current version so far โ new entries appear as the app ships updates.
YAPP Official is a lifestyle app by DONGCHYEON with 10+ downloads (about 34 estimated). Install growth, rank history, SDKs and ad networks.
From the store listing: โYAPP Official is an official app only for certified members of the IT union club YAPP. Check announcements, sessions, and attendance information at once.โ