Only the current version so far — new entries appear as the app ships updates.
マルチタスク管理カレンダー：１日の作業時間がわかる is a productivity app by Toshinobu Miyauchi with 10+ downloads (about 24 estimated). Released Dec 15, 2021. Install growth, rank history, SDKs and ad networks.
From the store listing: “An app that manages the work time of multiple tasks”
