Only the current version so far — new entries appear as the app ships updates.
円の面積・円周ラボ｜円周率を図で学ぶ is an education app by LBB LLC with 1+ downloads (about 1 estimated). +1 installs in the last 7 days. Released Oct 21, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Let's divide and rearrange the circle to verify the formula for area and the relationship between circumference and pi.”
