Only the current version so far — new entries appear as the app ships updates.
キーワード・メモ is a tools app by F-DEVELOPER with 5+ downloads (about 8 estimated). +1 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “This app is designed to let you save keywords that interest you and look them up whenever you have time.”