You’ve created a Whatsapp clone!
You are welcome to add more features and extend this tutorial by pull requesting this repository.
Creating a full stack real time mobile app has never been so fast and easy.
And the most important thing - the tools we used (Meteor, Ionic) are good not only for simple use cases but also for a full production scale apps.
You can safely start with those solutions knowing that you won't have to switch to different solutions when your app will scale and add features.