電話帳 is a contact app that allows iPhone users to make safe and convenient phone calls. It enables users to import their contact data from their iPhone and utilize it within the app.

One of the key features of 電話帳 is its nuisance call warning function, available for iOS 10 and later. This feature ensures the safety of incoming calls by displaying warning messages for potential nuisance calls. It also prevents the risk of accidentally redialing unidentified calls, such as missed calls or prank calls, from the call history.

Another useful feature is the automatic furigana (Japanese phonetic script) function. Even if contact data does not include furigana, users can still perform furigana searches, enhancing the app's search capabilities.

Furthermore, 電話帳 offers a CSV export function, allowing users to convert their existing contact data into CSV format and send it via email. The app also includes a prefix function, eliminating the need to edit contact data for services that require entering a specific prefix number, such as Least Cost Routing (LCR).

In terms of security, the app provides robust features such as PIN code authentication and fingerprint recognition. In the event of three consecutive incorrect PIN code attempts, all data stored within 電話帳 will be erased.

Additionally, 電話帳 seamlessly integrates with AGEphone, enabling users to make their everyday phone calls even more convenient when using AGEphone+電話帳.