Saving Data on Android

Good Performance
: Compared to reading directly from a file, Sqlite is much 
faster since you only load the data that you need rather than reading and holding 
an entire file in memory.
The main disadvantage of using SQLite is that, since it relies on local file storage, 
your data will be lost if the user decides to delete the app's data. It is usually 
recommended that you have a backup on a remote database or service such as 
Firebase.
Frequently asked Room ques/ons
Are ORMs really necessary? Can't I just use plain old SQLite?
Of course you can use plain old SQLite! In fact, Android standard libraries include many 
utilities and classes that help you work directly with SQLite. The only downside with this 
approach is that you often have to deal with a lot of boilerplate code that can slow down 
your development.
Are there other ORMs for Android besides Room?
Sure! There many ORMs out there like greenDao or SugarORM.