Castbox is an Android app developed by Castbox.FM - Radio & Podcast & AudioBooks (Unit 805 Harbour Crystal Centre, 100 Granville Road, Tsim Sha Tsui East, Kowloon, Hong Kong). Others apps created by Castbox.FM - Radio & Podcast & AudioBooks are: Podcast - Castbox Radio Music.

Castbox first became available on 16 Feb 2017. Castbox has been awarded with the "Editors' Choice" badge. It is estimated that Castbox has been downloaded between 10000000 and 50000000 times from the Play Store.