Only the current version so far — new entries appear as the app ships updates.
Bell24staff 公式アプリ is a productivity app by 株式会社ベルシステム24 with 5,000+ downloads (about 7.7K estimated). +11 installs in the last 7 days. Released Jul 31, 2018. Install growth, rank history, SDKs and ad networks.
From the store listing: “The Bell 24 staff application is a communication tool provided by Bell System 24.”