Demonstrate an app using fundamentals of React including simple and class components, state, props, and submitting form data to add new data or update existing records. Users can freely add characters to the table, then they can remove any character from the table or edit any specific data record.

iOS and Android mobile apps are also delivered. The apps are developed with React Native, anyone who is interested can test the apps through the Expo Publish Link as above with Expo Go app.