[Question] How to write a app with cloud database?

[Kriz Chong]

I am very new on making app, and I need to make a app which can read and write to cloud database.

For example, a attendance app for different classes.
Each class has an app and login with class name, then user can select the student's name of the class, then tag in and out as record.

This involve on different structure of database which I am not so familiar with.

Is there any website or tutorial about making android app with cloud database that I can refer to?
Or any simple tool that can create such app?

Thank you...