Hello sir
I am android developer and i have read your message, so let me describe you what i will provide you if you select me
App in
Kotlin,
RxJava,
Retrofit,
Room database for local storage,
AES encryption algorithm for security,
Any type of payment gateway,
Notification
I have already made spinner app. if you want To check then let me know
let me know your feedback for more discussion
looking forward from your side
NOTE : please send hello message for communication
Thanks
Sudhir