Freestyle Rap | Tools + Apps RapPad The "Freestyle Rap Coach" by RapPad generates words and phrases while playing instrumentals for you to rap to. This tool is also available as an app for Android and iOS. Rapscript Rapscipt is another word generator that offers slightly different features. This tool is also available as an app for Android and iOS. Rapchat Rapchat is a phone app that allows users to "create, share and discover freestyle raps." Additionally, Rapchat provides you with free beats from "upcoming producers" to rap over! Android (beta) and iOS.