Development of a client application, tips?

Question

Mobile development

It is necessary to develop a client android application in which there should be:
1) Lessons (with a choice of sections)
2) Testing for these lessons
3) Testing by time
There are about 500 lessons, questions, respectively, in the same way, how can all this be implemented? with a base data?
Or is it possible to read data from the site? Help with advice, but the application must be client)

Answer 1

You can create a database in advance and connect it in the application. If some data has changed (lessons / questions / answers) - form a new database, connect it and release an application update.

Answer 2

...with a database?...but the application must be client-side)

No offense, but you have a mess in your head) ─ diploma?
You need a server, on it a web muzzle to fill in and rest api for the client, the
client communicates with the server using api, well, then your business logic
is definitely needed