Hi,
I am expert in Android [ kotlin ], [ java ], [ Flutter ] apps working with quite a few years,
I have read your project proposal
I can make apk from your Android [ Java ] app source code in accordance with your needs.
Share the source code with me so i can make apk for you in one hour.
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.