Ghostly Voice is an iPhone app developed by Tsukahara Kazunari, available for free on the App Store under the Lifestyle category. The app is designed to simulate ghostly sounds and voices, allowing users to surprise their friends and loved ones.

The app features a simple and easy-to-use interface, with the ability to record and share the ghostly sounds and voices with others. Users can also take photos and videos while using the app to capture the reactions of those around them.

Overall, Ghostly Voice is a fun and entertaining app that can provide hours of spooky fun for those who enjoy pranking their friends. It is a great addition to any Halloween party or sleepover and is sure to provide plenty of scares and laughs.