Only the current version so far — new entries appear as the app ships updates.
CircleApp is an education app by Scoville Co., Ltd. with 1,000+ downloads (about 4K estimated). +11 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “A circle-only communication app used by 4,500 circles from 390 universities nationwide. Full of functions to collect points in response to offers from companies and functions useful for club activities!”