greenDAO is an open source Android ORM making development for SQLite databases fun again. It relieves developers from dealing with low-level database requirements while saving development time An ORM is a layer between the relational SQLite database and the object-oriented app code. The ORM allows the developer to use the database without the need to transform objects into a format suited for the relational database.

At the end of this tutorial you should be able to integrate GreenDao into your android application in less than 10 minutes.

I have been a fan of Firebase since it was launched and started using this wonderful real-time database platform fully since May 2016 for mobile applications I developed. Though there are some limitations that i have noticed, For example triggering a app to app notification. So we will be implementing a firebase app to app notification without implementing a server backend.