Hi,
I am expert in Android [ kotlin ], [ java ], [ Flutter ] apps working with quite a few years,
I have read your project description.
I can build your Android [ Java ] app using Room DB in accordance with your needs
It seems we need to discuss in detail about you app requirements.
So, it's would be extendable latter if you want to add new functionality in your app.
I will provide you a quality work.
Let's chat to proceed.