SQLite to Register on multiple device- Android

I'm developing a course selection app for a university. Students must register to application. I'm using SQLlite by using db helper, my table contains studentID,password,name etc.

My question is this sqlite db stays on only local ? I mean, how can i reach student table on multiple device, read and write at the same time. When it puts on the play store thousand of student will use it.

Which technologies should i use, where should i put the db ? I'm really confused about it, thanks for advance.