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
let me know your feedback for more discussion
looking forward from your side
NOTE : please send hello message for communication
Thanks
Sudhir