Hello,
I am expert full time developer, I saw your requirements and you need APK FILE CUSTOMIZATION for Android and i have already done similar types of work. I will follow all your instructions during the development and show you my best quality work.
and i am expert for frontend and backend app.
My expertise area in Android Studio , MySQL , JSON, Restful API, Etc.
I look forward to hear from you soon.
Regards,
Shivam G.