Only the current version so far — new entries appear as the app ships updates.
ウォン円計算機 is a travel & local app by attyu with 100+ downloads (about 497 estimated). +11 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “A simple calculator that converts Korean won and Japanese yen. Rates are also updated daily.”