This tutorial explains how to create custom toast message in android or ios device in react native application. Toast is the one of the oldest component in android applications history.Toast would only obtain text message and automatically fill on screen according to given message. By default react native Android app supports Toast message but the iOS dose not support Toast. Toast is the one of the oldest component in android applications history. Its been present since the beginning of Android app development and continuously used by millions of developers. Toast is used to give a simple feedback on any given task when the task is completed.