Only the current version so far — new entries appear as the app ships updates.
麻雀点数計算ドリル is an entertainment app by kennyu66 with 5,000+ downloads (about 6.8K estimated). +5 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “Report points smartly. Let's memorize the score less than Manchu.”