BoatOdds|競艇オッズ計算・買い目最適化・トリガミ防止 is a tools app by Office110 with 10,000+ downloads (about 23K estimated). +35 installs in the last 7 days. Released May 5, 2012. Install growth, rank history, SDKs and ad networks.
From the store listing: “Instantly calculate boat racing odds! Prevent pitfalls and equalize profits for efficient betting”