ctcクラウドフォン is a business and productivity application available on iPhone. It offers features such as external line calls, internal line calls, call forwarding, call pickup, after-hours announcements, and integration with the "Cloud Phone Book" service (subscription required). It is specifically designed for corporate use and requires application for the "Cloud PBX" service through Chubu Telecommunications' sales representative.

Ideal for businesses needing a comprehensive phone system, ctcクラウドフォン provides essential functionalities like call management and cloud phone book integration. Users can efficiently handle external and internal calls, set up call forwarding, and benefit from after-hours announcements. Note that access to this service is exclusively through Chubu Telecommunications' sales representative.